Display device

ABSTRACT

A display device according to an embodiment includes a display area that includes a first and a second display area, a first pixel circuit portion on the first display area, a first light emitting element connected to the first pixel circuit portion; a second pixel circuit portion on the second display area, second light emitting elements connected to the second pixel circuit portion, and a driving circuit portion connected to the first and second pixel circuit portions, and overlapping the second light emitting element. An edge of the display area includes a straight line portion and a rounded portion. An arrangement of the second light emitting elements is different in the straight line portion than in the rounded portion.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority to and benefits of Korean PatentApplication No. 10-2021-0089533 under 35 U.S.C. § 119, filed on Jul. 8,2021, in the Korean Intellectual Property Office, the entire contents ofwhich are incorporated herein by reference.

BACKGROUND 1. Technical Field

The disclosure relates to a display device.

2. Description of the Related Art

A display device displays a screen, and includes a liquid crystaldisplay (LCD), an organic light emitting diode (OLED) display, and thelike. Such display devices may be used in electronic devices such asportable phones, navigation devices, digital cameras, electronic books,portable game devices, or terminals.

The display device may include a display area in which a screen isdisplayed and a peripheral area in which a screen is not displayed.Pixels may be disposed in the display area in the row direction and thecolumn direction. In each pixel, devices such as transistors andcapacitors and wires that can supply signals to these devices can bepositioned. In the peripheral area, wires, scan drivers, data drivers,controllers, and the like that transmit electrical signals to drivethese pixels may be positioned.

Although the demand for reducing the size of the peripheral area andexpanding the display area is increasing, it is difficult to reduce thesize of the peripheral area because of the area occupied by the drivermay increase to support high resolutions and high speed operations.

It is to be understood that this background of the technology sectionis, in part, intended to provide useful background for understanding thetechnology. However, this background of the technology section may alsoinclude ideas, concepts, or recognitions that were not part of what wasknown or appreciated by those skilled in the pertinent art prior to acorresponding effective filing date of the subject matter disclosedherein.

SUMMARY

Embodiments provide a display device that may have an expanded displayarea.

The embodiments provide a display device that may have a rounded portionat an edge of a display device with a smooth curved shape.

A display device according to an embodiment may include a display area,the display area including a first display area and a second displayarea, a first pixel circuit portion that is disposed on the firstdisplay area, a first light emitting element that is electricallyconnected to the first pixel circuit portion, a second pixel circuitportion that is disposed on the second display area, second lightemitting elements that are electrically connected to the second pixelcircuit portion; and a driving circuit portion that is electricallyconnected to the first pixel circuit portion and to the second pixelcircuit portion, and overlapping the second light emitting element in aplan view. An edge of the display area may include a straight lineportion having a straight line shape and a rounded portion having arounded shape. An arrangement form of the second light emitting elementsdisposed in the straight line portion and an arrangement form of thesecond light emitting elements disposed in the rounded portion may bedifferent.

The display device may further include light emitting element groups,each of the light emitting element groups including eight of the secondlight emitting elements that are adjacent to each other in a firstdirection, and in a second direction that is perpendicular to the firstdirection. The second pixel circuit portion may be connected to two ofthe second light emitting elements. Edges of the light emitting elementgroups that are adjacent to each other in the second direction and aredisposed in the straight light portion may be aligned with each other.Edges of light emitting element groups that are adjacent to each otherin the second direction and are disposed in the rounded portion may beshifted from each other.

The eight of the second light emitting elements of each of the lightemitting element groups may be arranged in a matrix format of 2×4. Adistance the edges of light emitting groups that are adjacent to eachother in the second direction and disposed in the rounded portion may beshifted from each other corresponds to one or two widths of one of thesecond light emitting elements.

The display device may further include light emitting element groups,each of the light emitting element groups including twelve of the secondlight emitting elements that are adjacent to each other in a firstdirection, and in a second direction that is perpendicular to the firstdirection. The second pixel circuit portion may be electricallyconnected to three second light emitting elements. Edges of the lightemitting element groups that are adjacent to each other in the seconddirection and are disposed in the straight line portion may be alignedwith each other. Edges of the light emitting element groups that areadjacent to each other in the second direction and are disposed in therounded portion may be shifted from each other.

The twelve of the second light emitting elements of each of the lightemitting element groups may be arranged in a matrix format of 2×6. Adistance the edges of light emitting element groups that are adjacent toeach other in the second direction and disposed in the rounded portionare shifted from each other may correspond to two or four widths of oneof the second light emitting elements.

The display device may further include light emitting element groups,each of the light emitting element groups including sixteen of thesecond light emitting elements that are adjacent to each other in afirst direction, and in a second direction that is perpendicular to thefirst direction. Four second light emitting elements may be electricallyconnected to the second pixel circuit portion. Edges of the lightemitting element groups that are adjacent to each other in the seconddirection and are disposed in the straight line portion may be aligned.Edges of the light emitting element groups that are adjacent in thesecond direction and are disposed in the rounded portion may be shiftedfrom each other.

The sixteen light emitting elements of each of the light emittingelement groups may be arranged in a matrix format of 2×8. A distance theedges of light emitting element groups are shifted from each other maycorrespond to two or four widths of one of the second light emittingelement.

The second pixel circuit portion may include a first sub-pixel circuitportion, a second sub-pixel circuit portion, a third sub-pixel circuitportion, and a fourth sub-pixel circuit portion. Each of the secondlight emitting elements may include first sub-light emitting elementsthat are electrically connected to the first sub-pixel circuit portion,second sub-light emitting elements that are electrically connected tothe second sub-pixel circuit portion, third sub-light emitting elementsthat are electrically connected to the third sub-pixel circuit portion,and fourth sub-light emitting elements that are electrically connectedto the fourth sub-pixel circuit portion.

The first sub-light emitting elements may emit red light. The secondsub-light emitting elements may emit blue light. The third sub-lightemitting elements and the fourth sub-light emitting elements may emitgreen light.

The display device according to the embodiment may further include anextension wire that electrically connects the second pixel circuitportion to the second light emitting elements.

The display device may further include a peripheral area surrounding thedisplay area. The display area may display an image. The second displayarea may be disposed between the first display area and the peripheralarea. A part of the driving circuit portion may overlap the seconddisplay area in a plan view. A remaining part of the driving circuitportion may overlap the peripheral area in a plan view.

The display device may further include light emitting element groups,each of the light emitting element groups including at least one of thesecond light emitting elements that are adjacent to each other in afirst direction, and in a second direction that is perpendicular to thefirst direction. A number of second light emitting elements included inone of the light emitting element groups disposed in the rounded portionand a number of second light emitting elements included in one of thelight emitting element groups disposed in the straight line portion maybe different.

The number of second light emitting elements included in one of thelight emitting element groups disposed in the rounded portion may beless than the number of second light emitting elements included in oneof the light emitting element groups disposed in the straight lineportion.

At least one of the light emitting element groups disposed in therounded portion may include at least one of the second light emittingelements that is disposed on the edge with reference to a light emittingelement group disposed on the straight line portion and may be turnedoff.

Sixteen of the second light emitting elements included in one of thelight emitting element groups that are disposed in the straight lineportion may be arranged in a matrix format of 2×8, and the lightemitting element groups that are disposed in the rounded portion mayhave an arrangement form in which second light emitting elementsdisposed in the second row and the first column and the second row andthe second column are turned off.

At least one of the second light emitting elements may include a pixelelectrode electrically connected to the second pixel circuit portion; anemission layer disposed on the pixel electrode; and a common electrodedisposed on the emission layer.

In an area where at least one of the second light emitting elements isturned off, the pixel electrode and the emission layer may not bedisposed.

In an area where at least one of the second light emitting elements isturned off, the pixel electrode may be disposed, and the emission layermay not be disposed.

A width of a light emitting area of at least one of the second lightemitting elements of one of the light emitting element groups disposedin the rounded portion may be narrower than a width of a light emittingarea of at least one of the second light emitting elements disposed inthe straight line portion.

A portion of the first display area may be disposed in an end of therounded portion. The second display area may not be disposed in the endof the rounded portion.

According to the embodiments, a display device may have an expandeddisplay area.

The display device according to the embodiments may have a smooth curvedshape in the rounded portion of the edge of the display area.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic top plan view of a display device according to anembodiment.

FIG. 2 is a schematic cross-sectional view of FIG. 1 , taken along theline II-II.

FIG. 3 is a schematic cross-sectional view of a part of the displaydevice according to the embodiment.

FIG. 4 is a schematic cross-sectional view of enlarging area AA of FIG.3 .

FIG. 5 is a schematic diagram of an equivalent circuit of a pixel of adisplay device according to an embodiment.

FIG. 6 shows an arrangement form of a first pixel circuit portion of thedisplay device and an arrangement form of a first light emittingelement, respectively, according to the embodiment.

FIG. 7 shows an arrangement form of a second pixel circuit portion ofthe display device and an arrangement form of a second light emittingelement, respectively, according to the embodiment.

FIG. 8 shows a connection of the second light emitting elements of thedisplay device according to the embodiment.

FIG. 9 and FIG. 10 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion, and an arrangement form ofthe first light emitting element and the second light emitting element.

FIG. 11 show an arrangement form of the first pixel circuit portion andthe second pixel circuit portion, and an arrangement form of the firstlight emitting element and the second light emitting element.

FIG. 12 shows an arrangement form of the second pixel circuit portion ofthe display device and an arrangement form of the second light emittingelement, respectively, according to an embodiment.

FIG. 13 shows a connection of the second light emitting elements of thedisplay device according to the embodiment.

FIG. 14 and FIG. 15 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion and an arrangement form ofthe first light emitting element and the second light emitting element.

FIG. 16 show an arrangement form of the first pixel circuit portion andthe second pixel circuit portion and an arrangement form of the firstlight emitting element and the second light emitting element.

FIG. 17 shows an arrangement form of the second pixel circuit portion ofthe display device and an arrangement form of the second light emittingelement, respectively, according to an embodiment.

FIG. 18 shows a connection of the second light emitting elements of thedisplay device according to the embodiment.

FIG. 19 and FIG. 20 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion and an arrangement form ofthe first light emitting element and the second light emitting element.

FIG. 21 show an arrangement form of the first pixel circuit portion andthe second pixel circuit portion and an arrangement form of the firstlight emitting element and the second light emitting element.

FIG. 22 is a top schematic plan view of some area of the display deviceaccording to the embodiment.

FIG. 23 and FIG. 24 show second light emitting elements positioned atedges of the display area of the display device according to theembodiment.

FIG. 25 to FIG. 27 are schematic cross-sectional views of a part of thedisplay device according to the embodiment.

FIG. 28 is a top schematic plan view of a part of a display deviceaccording to a reference example.

FIG. 29 is a top schematic plan view of some area of a display areaaccording to an embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The disclosure will be described more fully hereinafter with referenceto the accompanying drawings, in which embodiments are shown. Thisdisclosure may, however, be embodied in different forms and should notbe construed as limited to the embodiments set forth herein. Rather,these embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the disclosure to thoseskilled in the art.

The drawings and description are to be regarded as illustrative innature and not restrictive. Like reference numerals designate likeelements throughout the specification.

In the drawings, size and thickness of each element are arbitrarilyillustrated for convenience of description, and the embodiments are notnecessarily limited to as illustrated in the drawings. In order toclearly express various layers and regions in the drawings, thethicknesses are enlarged. In the drawings, the thickness of layers,films, panels, regions, etc., are exaggerated for clarity.

It will be understood that when an element such as a layer, film,region, or substrate is referred to as being “on” another element, itcan be directly on the other element or intervening elements may also bepresent. In contrast, when an element is referred to as being “directlyon” another element, there are no intervening elements present. It willbe understood that when an element such as a layer, film, region, orsubstrate is referred to as being “on” another element, it can bedirectly on the other element or intervening elements may also bepresent.

Unless explicitly described to the contrary, the word “comprise,” andvariations such as “comprises” or “comprising,” will be understood toimply the inclusion of stated elements but not the exclusion of anyother elements.

Throughout the specification, the phrase “in a plan view” means viewinga target portion from the top, and the phrase “in a cross-section” meansviewing a cross-section formed by vertically cutting a target portionfrom the side.

As used herein, the singular forms, “a,” “an,” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise.

In the specification and the claims, the term “and/or” is intended toinclude any combination of the terms “and” and “or” for the purpose ofits meaning and interpretation. For example, “A and/or B” may beunderstood to mean “A, B, or A and B.” The terms “and” and “or” may beused in the conjunctive or disjunctive sense and may be understood to beequivalent to “and/or.”

In the specification and the claims, the phrase “at least one of” isintended to include the meaning of “at least one selected from the groupof” for the purpose of its meaning and interpretation. For example, “atleast one of A and B” may be understood to mean “A, B, or A and B.”

It will be understood that, although the terms first, second, etc., maybe used herein to describe various elements, these elements should notbe limited by these terms. These terms are only used to distinguish oneelement from another element. For example, a first element may bereferred to as a second element, and similarly, a second element may bereferred to as a first element without departing from the scope of thedisclosure.

“About,” “substantially,” or “approximately” as used herein is inclusiveof the stated value and means within an acceptable range of deviationfor the particular value as determined by one of ordinary skill in theart, considering the measurement in question and the error associatedwith measurement of the particular quantity (i.e., the limitations ofthe measurement system). For example, “about” may mean within one ormore standard deviations, or within ±30%, 20%, 10%, 5% of the statedvalue.

It will be understood that when an element (or a region, a layer, aportion, or the like) is referred to as “being on”, “connected to” or“coupled to” another element in the specification, it can be directlydisposed on, connected or coupled to another element mentioned above, orintervening elements may be disposed therebetween.

It will be understood that the terms “connected to” or “coupled to” mayinclude a physical or electrical connection or coupling.

Herein, the term “dead space” may be understood as a space which isdevoted to accommodating one or more components that, either singularlyor plurally, perform an intended function.

Unless otherwise defined or implied herein, all terms (includingtechnical and scientific terms) used herein have the same meaning ascommonly understood by one of ordinary skill in the art to which thedisclosure pertains. It will be further understood that terms, such asthose defined in commonly used dictionaries, should be interpreted ashaving a meaning that is consistent with their meaning in the context ofthe relevant art and will not be interpreted in an idealized or overlyformal sense unless expressly so defined herein.

The term a “matrix format” may be understood as elements substantiallyarranged in rows and columns in the shape of a matrix as understood bythose of ordinary skill in the art. The term a “matrix format of MxN,”where M and N are numbers, is intended to include matrices where thenumber of rows of the matrix may be M, the number of columns may be N,as well as matrices where the number of columns may be M, and the numberof rows may be N.

Referring to FIG. 1 and FIG. 2 , a display device according to anembodiment will be described.

FIG. 1 is a schematic top plan view of a display device according to anembodiment, and FIG. 2 is a schematic cross-sectional view of FIG. 1 ,taken along the line II-II.

As shown in FIG. 1 and FIG. 2 , in an embodiment, display device 1000may include substrate 110 and light emitting elements ED1 and ED2positioned on substrate 110

The substrate 110 includes a display area DA and a peripheral area PAthat is adjacent to the display area DA.

The display area DA may be disposed at a center portion of the displaydevice 1000, and may be formed in the shape of an approximatelyquadrangle of which each corner portion is rounded. For example, edgesof the display area DA may include straight line portions STR having astraight line shape and rounded portions RND having a rounded shape.However, the shape of the display area DA and the shape of the cornersare not limited thereto, and may be variously changed. The display areaDA may include a first display area DA1 and a second display area DA2that is adjacent to the first display area DA1. The first display areaDA1 may be disposed at a center of the display area DA, and the seconddisplay area DA2 may be disposed on both sides of the first display areaDA1, for example, left and right. However, this is only an example, andpositions of the first display area DA1 and the second display area DA2may be changed. For example, the first display area DA1 may have asubstantially quadrangular shape, and the second display area DA2 maysurround four corners of the first display area DA1. For example, thesecond display area DA2 may be positioned to the left, right, upper, andlower sides of the first display area DA1.

The peripheral area PA may surround the display area DA. The peripheralarea PA may be a region in which no image is displayed, and may bepositioned at the periphery of the display device 1000.

At least a portion of the display device according to the embodiment mayinclude a bent portion. For example, the central portion of the displaydevice 1000 may be flat, and the edge portion may have a curved shape.At least a portion of the second display area DA2 may be positioned inthe bent portion. That is, at least a portion of the second display areaDA2 of the substrate 110 may have a curved shape.

Light emitting elements ED1 and ED2 may emit a selected light. Forexample, the light emitting elements ED1 and ED2 may emit red, green,and blue or white light. The display device 1000 may display a selectedimage through light emitted from the light emitting elements ED1 andED2. The light emitting elements ED1 and ED2 may include a first lightemitting element ED1 and a second light emitting element ED2. The lightemitting elements ED1 and ED2 may be disposed in the display area DA.The first light emitting element ED1 may be disposed in the firstdisplay area DA1, and the second light emitting element ED2 may bedisposed in the second display area DA2. Although not illustrated, thedisplay device 1000 according to the embodiment may include multiplefirst light emitting elements ED1 and multiple second light emittingelements ED2. The first light emitting elements ED1 in the first displayarea DA1 may be disposed in the first direction DR1 and second directionDR2, and the second light emitting elements ED2 in the second displayarea DA2 may be disposed in the first direction DR1 and second directionDR2. A size of the first light emitting element ED1 and a size of thesecond light emitting element ED2 may be substantially similar ordifferent from each other. For example, the size of the second lightemitting element ED2 may be larger than the size of the first lightemitting element ED1. The number of first light emitting elements ED1per unit area and the number of second light emitting elements ED2 perunit area may be substantially similar or different from each other. Forexample, the number of second light emitting elements ED2 per unit areamay be less than the number of first light emitting elements ED1 perunit area. The resolution of the first display area DA1 and theresolution of the second display area DA2 may be the same as ordifferent from each other. For example, the resolution of the firstdisplay area DA1 may be higher than that of the second display area DA2.The alignment shape, size, and resolution of the first display area DA1and the second display area DA2 of the first light emitting element ED1and the second light emitting element ED2 are not limited thereto, andmay be variously changed.

The display device 1000 according to the embodiment may further includepixel circuit portions PC1 and PC2 disposed on the substrate 110. Thepixel circuit portions PC1 and PC2 may include a first pixel circuitportion PC1 and a second pixel circuit portion PC2. The display deviceaccording to the embodiment may include multiple first pixel circuitportions PC1 and multiple second pixel circuit portions PC2. The firstpixel circuit portion PC1 indicates a region where the first pixelcircuit portions PC1 are substantially arranged in a first direction DR1and a second direction DR2, and the second pixel circuit portion PC2indicates a region where the second pixel circuit portions PC2 aresubstantially arranged in the first direction DR1 and the seconddirection DR2. The arrangement form of the pixel circuit portions PC1and PC2 is not particularly limited, and the pixel circuit portions PC1and PC2 may be arranged in various forms. The first pixel circuitportion PC1 may be disposed in the first display area DA1, and thesecond pixel circuit portion PC2 may be disposed in the second displayarea DA2. Each of the pixel circuit portions PC1 and PC2 may beelectrically connected to at least one of the light emitting elementsED1 and ED2. The first pixel circuit portion PC1 may be electricallyconnected to the first light emitting element ED1, and the second pixelcircuit portion PC2 may be connected to the second light emittingelement ED2. The second pixel circuit portions PC2 may be electricallyconnected to the second light emitting elements ED2. A size of a firstpixel circuit portion PC1 and a size of a second pixel circuit portionPC2 may be substantially similar or different from each other. Forexample, the size of a second pixel circuit portion PC2 may be largerthan the size of a first pixel circuit portion PC1. A structure of thefirst pixel circuit portion PC1 and a structure of the second pixelcircuit portion PC2 may be different from each other.

The display device 1000 according to the embodiment may further includea driving circuit portion DR disposed on the display device 1000. Thedriving circuit portion DR may be electrically connected to the firstpixel circuit portion PC1 and the second pixel circuit portion PC2. Thedriving circuit portion DR may include multiple driver and signal wires.For example, the driving circuit portion DR may include a scan driver, adata driver, a driving voltage supply line, a common voltage supplyline, and signal transmission wires electrically connected to the scandriver, the data driver, the driving voltage supply line, and the commonvoltage supply line. The scan driver generates a scan signal andtransmits the scan signal to the pixel circuit portions PC1 and PC2through a scan line. The data driver generates a data signal andtransmits the data signal to the pixel circuit portions PC1 and PC2through a data line. The driving voltage supply line transmits a drivingvoltage to the pixel circuit portions PC1 and PC2. The common voltagesupply line transmits a common voltage to an electrode of each of thelight emitting elements ED1 and ED2. At least a part of the drivingcircuit portion DR may be disposed in the second display area DA2, and apart of the rest may be disposed in the peripheral area PA.

In the first display area DA1, the first pixel circuit portion PC1 maybe electrically connected to the first light emitting element ED1disposed on the first pixel circuit portion PC1. A light emission areaof the first light emitting element ED1 may overlap the first pixelcircuit portion PC1 electrically connected to the first light emittingelement ED1. The first display area DA1 is an area where light isemitted by the first light emitting elements ED1.

In the second display area DA2, the second pixel circuit portion PC2 maybe electrically connected to the second light emitting element ED2disposed at a selected distance from the second pixel circuit portionPC2. A light emission area of the second light emitting element ED2 maynot overlap the second pixel circuit portion PC2 connected thereto. Thelight emission area of the second light emitting element ED2 may overlapa second pixel circuit portion PC2 that is not connected to the secondlight emitting element ED2. The light emission area of the second lightemitting element ED2 may also overlap the driving circuit portion DR. Apart of the light emission area of the second light emitting element ED2may overlap the second pixel circuit portion PC2 electrically connectedto the second light emitting element ED2. The second display area DA2 isan area where light is emitted by the second light emitting element ED2.

In a display device, a pixel circuit portion and a light emittingelement display area may be disposed in a display area, a drivingcircuit portion may be disposed in a peripheral area that surrounds thedisplay area. A pixel circuit portion and a light emitting element maynot be disposed in the peripheral area. Thus, light is not emitted inthe peripheral area where the driving circuit portion is disposed, and adead space may be formed. In the display device according to anembodiment, the second light emitting element ED2 is disposed at aportion where the driving circuit portion DR is disposed to emit light,and thus a region in which the screen is displayed can be expanded. Thedead space may be reduced, and the bezel may be reduced by disposing thesecond light emitting element ED2 on the driving circuit portion DR.

Hereinafter, referring to FIG. 3 and FIG. 4 , a connection relationshipbetween each pixel circuit portion and a light emitting element of thedisplay device according to the embodiment will be described.

FIG. 3 is a schematic cross-sectional view of a part of the displaydevice according to the embodiment, and FIG. 4 is a schematiccross-sectional view enlarging area AA of FIG. 3 .

First, as shown in FIG. 3 , the light emission area of the first lightemitting element ED1 of the display device according to the embodimentmay overlap the first pixel circuit portion PC1 electrically connectedto the first light emitting element ED1.

The first pixel circuit portion PC1 may include a semiconductor 1130, agate electrode 1151, a source electrode 1173, and a drain electrode 1175disposed on the first display area DA1 of the substrate 110.

The substrate 110 may include at least one of polystyrene, polyvinylalcohol, polymethyl methacrylate, polyethersulfone, polyacrylate,polyetherimide, polyethylene naphthalate, polyethylene terephthalate,polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulosetriacetate, and cellulose acetate propionate. The substrate 110 mayinclude a flexible material that can be bent or folded, and may includea single layer or multiple layers.

A buffer layer 111 may be disposed on the substrate 110. The bufferlayer 111 may have a single-layered or multi-layered structure. Thebuffer layer 111 may include an inorganic insulating material such as asilicon nitride (SiN_(x)), a silicon oxide (SiO_(x)), a siliconoxynitride (SiO_(x)N_(y)), and the like, or an organic insulatingmaterial. The buffer layer 111 may be omitted as necessary. A barrierlayer may further be disposed between the substrate 110 and the bufferlayer 111. The barrier layer may have a single-layered or multi-layeredstructure. The barrier later may include an inorganic insulatingmaterial such as a silicon nitride (SiN_(x)), a silicon oxide (SiO_(x)),a silicon oxynitride (SiO_(x)N_(y)), and the like.

A semiconductor layer that includes a semiconductor 1130 of the firstpixel circuit portion PC1 may be disposed on the buffer layer 111. Thesemiconductor 1130 may include a first region 1131, a channel 1132, anda second region 1133. A first region 1131 and a second region 1133 maybe respectively disposed at opposite sides of the channel 1132 of thefirst pixel circuit portion PC1. The semiconductor 1130 of the firstpixel circuit portion PC1 may include a semiconductor material such asamorphous silicon, polysilicon, an oxide semiconductor, and the like.

A first gate insulating layer 141 may be disposed on the semiconductor1130 of the first pixel circuit portion PC1. The first gate insulatinglayer 141 may have a single-layered or multi-layered structure. Thefirst gate insulating layer 141 may include an inorganic insulatingmaterial such as a silicon nitride (SiN_(x)), a silicon oxide (SiO_(x)),a silicon oxynitride (SiO_(x)N_(y)), and the like.

A first gate conductive layer that includes a gate electrode 1151 of thefirst pixel circuit portion PC1 may be disposed on the first gateinsulating layer 141. The gate electrode 1151 of the first pixel circuitportion PC1 may overlap the channel 1132 of the semiconductor 1130. Thefirst gate conductive layer may have a single-layered or multi-layeredstructure. The first gate conductive layer may include a metallicmaterial such as molybdenum (Mo), aluminum (Al), copper (Cu), and/ortitanium (Ti). A doping process or plasma treatment may be carried outafter forming the first gate conductive layer. A portion of thesemiconductor layer, covered by the first gate conductive layer is notdoped or plasma-treated, and a portion of the semiconductor layer, notcovered by the first gate conductive layer, is doped or plasma-treatedsuch that the portion may have the same characteristic as a conductor.

A second gate insulating layer 142 may be disposed on the first gateconductive layer including the gate electrode 1151 of the first pixelcircuit portion PC1. The second gate insulating layer 142 may have asingle-layered or multi-layered structure. The second gate insulatinglayer 142 an inorganic insulating material such as a silicon nitride(SiN_(x)), a silicon oxide (SiO_(x)), a silicon oxynitride(SiO_(x)N_(y)), and the like.

A second gate conductive layer including a first storage electrode 1153may be disposed on the second gate insulating layer 142. The second gateconductive layer may have a single-layered or multi-layered structure.The second gate conductive layer may include a metallic material such asmolybdenum (Mo), aluminum (Al), copper (Cu), and/or titanium (Ti). Thefirst storage electrode 1153 overlaps the gate electrode 1151 such thata storage capacitor is formed.

A first interlayer insulating layer 160 may be disposed on a second gateconductive layer including the first storage electrode 1153. The firstinterlayer insulating layer 160 may have a single-layered ormulti-layered structure. The first interlayer insulating layer 160 mayinclude an inorganic insulating material or an organic insulatingmaterial.

A first data conductive layer that includes a source electrode 1173 anda drain electrode 1175 of the first pixel circuit portion PC1 may bedisposed on the first interlayer insulating layer 160. The first dataconductive layer may include aluminum (Al), platinum (Pt), palladium(Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium(Nd), iridium (Ir), chromium (Cr), nickel (Ni), calcium (Ca), molybdenum(Mo), titanium (Ti), tungsten (W), and/or copper (Cu).

The first interlayer insulating layer 160 may include an opening thatoverlaps the source electrode 1173 of the first pixel circuit portionPC1 and the first region 1131 of the semiconductor 1130. The sourceelectrode 1173 of the first pixel circuit portion PC1 may beelectrically connected to the first region 1131 of the semiconductor1130 through the opening. The first interlayer insulating layer 160 mayinclude an opening that overlaps the drain electrode 1175 of the firstpixel circuit portion PC1 and the second region 1133 of thesemiconductor 1130. The drain electrode 1175 of the first pixel circuitportion PC1 may be electrically connected to the second region 1133 ofthe semiconductor 1130 through the opening.

A first protective layer 180 may be disposed on the first dataconductive layer including the source electrode 1173 and the drainelectrode 1175 of the first pixel circuit portion PC1. The firstprotective layer 180 may include an inorganic insulating material suchas a silicon nitride (SiN_(x)), a silicon oxide (SiO_(x)), a siliconoxynitride (SiO_(x)N_(y)), and/or an organic insulating material such asa polyimide, an acryl-based polymer, and a siloxane-based polymer.

A second data conductive layer that includes a connection electrode 510of the first pixel circuit portion PC1 may be disposed on the firstprotective layer 180. The second data conductive layer may includealuminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium(Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium(Cr), nickel (Ni), calcium (Ca), molybdenum (Mo), titanium (Ti),tungsten (W), and/or copper (Cu).

The first protective layer 180 may include an opening that overlaps thedrain electrode 1175 of the first pixel circuit portion PC1. Theconnection electrode 510 of the first pixel circuit portion PC1 may beelectrically connected to the drain electrode 1175 through the opening.

A second protective layer 182 may be disposed on the second dataconductive layer including the connection electrode 510 of the firstpixel circuit portion PC1. The second protective layer 182 may includean organic insulating material such as a general-purpose polymer such aspolymethyl methacrylate (PMMA) or polystyrene (PS), a polymer derivativehaving a phenolic group, an acryl-based polymer, an imide-based polymer,a polyimide, an acryl-based polymer, or a siloxane-based polymer.

The first light emitting element ED1 electrically connected to the firstpixel circuit portion PC1 may be disposed on the second protective layer182. The first light emitting element ED1 may include a pixel electrode1191, an emission layer 1370, and a common electrode 270.

A pixel electrode 1191 of the first light emitting element ED1 may bedisposed on the second protective layer 182. The second protective layer182 may include an opening 1181 that overlaps the pixel electrode 1191of the first light emitting element ED1 and the connection electrode 510of the first pixel circuit portion PC1. The pixel electrode 1191 of thefirst light emitting element ED1 may be electrically connected to theconnection electrode 510 of the first pixel circuit portion PC1 throughthe opening 1181. Thus, the pixel electrode 1191 of the first lightemitting element ED1 may be connected to the drain electrode 1175 of thefirst pixel circuit portion PC1 through the connection electrode 510.

A partitioning wall 350 may be disposed on the pixel electrode 1191 ofthe first light emitting element ED1. A pixel opening 1351 is formed inthe partitioning wall 350, and the pixel opening 1351 of thepartitioning wall 350 may overlap the pixel electrode 1191.

An emission layer 1370 of the first light emitting element ED1 may bedisposed in the pixel opening 1351 of the partitioning wall 350. Theemission layer 1370 may overlap the pixel electrode 1191.

A common electrode 270 may be disposed on the emission layer 1370 andthe partitioning wall 350.

The first light emitting element ED1 emits light around a region wherethe pixel electrode 1191, the emission layer 1370, and the commonelectrode 270 overlap. The light emission area of the first lightemitting element ED1 may overlap the first pixel circuit portion PC1connected to the first light emitting element ED1.

Each first light emitting element ED1 may display at least one of afirst color, a second color, and a third color. For example, the firstlight emitting element ED1 may display red R, green G, and blue Bcolors.

The light emission area of the second light emitting element ED2 of thedisplay device according to the embodiment may or may not overlap thesecond pixel circuit portion PC2 electrically connected to the secondlight emitting element ED2. Some of the second light emitting elementsED2 may overlap the second pixel circuit portion PC2 electricallyconnected to the second light emitting elements ED2. Other second lightemitting elements ED2 may overlap the driving circuit portion DR.

The second pixel circuit portion PC2 may include a semiconductor 2130, agate electrode 2151, a source electrode 2173, and a drain electrode 2175positioned on the second display area DA2 of the substrate 110. Thedriving circuit portion DR may include a semiconductor 3130, a gateelectrode 3151, a source electrode 3173, and a drain electrode 3175positioned on the second display area DA2 of the substrate 110.

The buffer layer 111 may be positioned on the substrate 110, and thesemiconductor 2130 of the second pixel circuit portion PC2 and thesemiconductor 3130 of the driving circuit portion DR may be positionedon the buffer layer 111. The semiconductor 2130 of the second pixelcircuit portion PC2 and the semiconductor 3130 of the driving circuitportion DR may be positioned in the semiconductor layer. Thesemiconductor 1130 of the second pixel circuit portion PC2 may include afirst region 1131, a channel 1132, and a second region 1133.

The first gate insulating layer 141 may be disposed on the semiconductor2130 of the second pixel circuit portion PC2 and the semiconductor 3130of the driving circuit portion DR, and the gate electrode 2151 of thesecond pixel circuit portion PC2 and the gate electrode 3151 of thedriving circuit portion DR may be disposed on the first gate insulatinglayer 141. The gate electrode 2151 of the second pixel circuit portionPC2 and the gate electrode 3151 of the driving circuit portion DR may bedisposed on the first gate conductive layer. The gate electrode 2151 ofthe second pixel circuit portion PC2 may overlap the channel 2132 of thesemiconductor 2130.

The second gate insulating layer 142 may be disposed on the gateelectrode 2151 of the second pixel circuit portion PC2 and the gateelectrode 3151 of the driving circuit portion DR, and a first storageelectrode 2153 of the second pixel circuit portion PC2 and a firststorage electrode 3153 of the driving circuit portion DR may be disposedon the second gate insulating layer 142. The first storage electrode2153 of the second pixel circuit portion PC2 may overlap the gateelectrode 2151 of the second pixel circuit portion PC2. The firststorage electrode 3153 of the driving circuit portion DR may overlap thegate electrode 3151 of the driving circuit portion DR.

A first interlayer insulating layer 160 may be disposed on the firststorage electrode 2153 of the second pixel circuit portion PC2 and thefirst storage electrode 3153 of the driving circuit portion DR. Thesource electrode 2173 and the drain electrode 2175 of the second pixelcircuit portion PC2 and the source electrode 3173 and the drainelectrode 3175 of the driving circuit portion DR may be disposed on thefirst interlayer insulating layer 160. The source electrode 2173 and thedrain electrode 2175 of the second pixel circuit portion PC2 and thesource electrode 3173 and the drain electrode 3175 of the drivingcircuit portion DR may be disposed on the first data conductive layer.

The first interlayer insulating layer 160 may include an opening thatoverlaps the source electrode 2173 of the second pixel circuit portionPC2 and the first region 2131 of the semiconductor 2130. The sourceelectrode 2173 of the second pixel circuit portion PC2 may beelectrically connected to the first region 2131 of the semiconductor2130 through the opening. The first interlayer insulating layer 160 mayinclude an opening that overlaps the drain electrode 2175 of the secondpixel circuit portion PC2 and the second region 2133 of thesemiconductor 2130. The drain electrode 2175 of the second pixel circuitportion PC2 may be electrically connected to the second region 2133 ofthe semiconductor 2130 through the opening. Similarly, the sourceelectrode 3173 of the driving circuit portion DR may be electricallyconnected to the first region of the semiconductor 3130, and the drainelectrode 3175 may be electrically connected to the second region of thesemiconductor 3130.

The first data conductive layer may further include an initializationvoltage line 127. The initialization voltage line 127 may transmit aninitialization voltage Vint. The initialization voltage Vint may be aconstant voltage. For example, a constant voltage may be applied to theinitialization voltage line 127.

The first protective layer 180 may be disposed on the source electrode2173 and the drain electrode 2175 of the second pixel circuit portionPC2 and the source electrode 3173 and the drain electrode 3175 of thedriving circuit portion DR.

The connection electrode 520 of the second pixel circuit portion PC2 maybe disposed on the first protective layer 180. The connection electrode520 of the second pixel circuit portion PC2 may be disposed in thesecond data conductive layer. The first protective layer 180 may includean opening that overlaps the drain electrode 2175 of the second pixelcircuit portion PC2. The connection electrode 520 of the second pixelcircuit portion PC2 may be electrically connected to the drain electrode2175 through the opening.

The second data conductive layer may further include a shield electrode530. The first protective layer 180 may include an opening that overlapsthe initialization voltage line 127. The shield electrode 530 may beelectrically connected to the initialization voltage line 127 throughthe opening. The shield electrode 530 may overlap the driving circuitportion DR, and may cover the driving circuit portion DR. The shieldelectrode 530 may receive the initialization voltage Vint through theinitialization voltage line 127.

The shield electrode 530 may be disposed between the driving circuitportion DR and the second light emitting element ED2. The second lightemitting element ED2 may overlap the driving circuit portion DR, and maybe affected by a voltage applied to the driving circuit portion DR. Inthe display device according to the embodiment, the effect of thedriving circuit portion DR on the second light emitting element ED2 maybe shielded by the shield electrode 530 to which a constant voltage suchas the initialization voltage Vint is applied. In FIG. 3 , the shieldelectrode 530 is electrically connected to the initialization voltageline 127, but the embodiments are not limited thereto. The shieldelectrode 530 may be electrically connected to another wire, and aconstant voltage may be applied to the shield electrode 530. Forexample, the shield electrode 530 may be connected to a wire to which acommon voltage ELVSS (refer to FIG. 5 ) is applied.

A second interlayer insulating layer 162 may be disposed on theconnection electrode 520 of the second pixel circuit portion PC2. Aportion of the connection electrode 520 of the second pixel circuitportion PC2 may be covered by the second interlayer insulating layer162, and another portion of the connection electrode 520 of the secondpixel circuit portion PC2 may be covered by the second protective layer182.

An extension wire 600 may be disposed on the second interlayerinsulating layer 162. The extension wire 600 may be electricallyconnected to the connection electrode 520 of the second pixel circuitportion PC2, and their connection will be described in more detail withreference to FIG. 4 , enlarging area AA of FIG. 3 . The extension wire600 and the second interlayer insulating layer 162 may be simultaneouslypatterned by using the same mask. Thus, the extension wire 600 may havea planar shape substantially equivalent to the second interlayerinsulating layer 162. The extension wire 600 may be disposed only in thesecond display area DA2 and may not be disposed in the first displayarea DA1. The second interlayer insulating layer 162 may also bedisposed only in the second display area DA2 and may not be disposed inthe first display area DA1. Thus, the second interlayer insulating layer162 may at least partially overlap the second pixel circuit portion PC2and the second light emitting element ED2, and may not overlap at allwith the first pixel circuit portion PC1 and the first light emittingelement ED1. Since the extension wire 600 and the second interlayerinsulating layer 162 are simultaneously patterned, the number of masksused in a manufacturing process of the display device according to theembodiment can be reduced. Accordingly, it is possible to reduce processcost, time, and the like. The extension wire 600 may overlap a portionof an edge of the connection electrode 520 of the second pixel circuitportion PC2. The second interlayer insulating layer 162 is disposedbetween the extension wire 600 and the connection electrode 520 of thesecond pixel circuit portion PC2, and the extension wire 600 and theconnection electrode 520 of the second pixel circuit portion PC2 are notdirectly connected. The extension wire 600 may also overlap the shieldelectrode 530 (refer to FIG. 3 ). The second interlayer insulating layer162 is disposed between the extension wire 600 and the shield electrode530 (refer to FIG. 3 ). The extension wire 600 and the shield electrode530 may be insulated by the second interlayer insulating layer 162.

The second protective layer 182 is disposed on the connection electrode520 of the second pixel circuit portion PC2 and the extension wire 600.The second protective layer 182 includes an overlapping portion of theconnection electrode 520 of the second pixel circuit portion PC2 and anopening that overlaps the periphery of the overlapping portion. A bridgeelectrode 195 may be disposed on the second protective layer 182. Thebridge electrode 195 may be positioned on the same layer as the pixelelectrode 1191 (refer to FIG. 3 ) of the first light emitting elementED1 (refer to FIG. 3 ). The bridge electrode 195 is disposed in theopening 2183, and may be connected to the connection electrode 520 ofthe second pixel circuit portion PC2 and the extension wire 600 in theopening 2183. Thus, the extension wire 600 and the connection electrode520 of the second pixel circuit portion PC2 may be connected by thebridge electrode 195.

Referring to FIG. 3 , multiple second light emitting elements ED2connected to the second pixel circuit portion PC2 may be disposed on thesecond protective layer 182. For example, the second pixel circuitportion PC2 may be connected to two second light emitting elements ED2.However, the number of second light emitting elements ED2 electricallyconnected to the second pixel circuit portion PC2 is not limitedthereto, and the second pixel circuit portion PC2 may be connected tothree or more second light emitting elements ED2. Each second lightemitting element ED2 may include a pixel electrode 2191, an emissionlayer 2370, and a common electrode 270.

The pixel electrode 2191 of each second light emitting element ED2 maybe disposed on the second protective layer 182. The pixel electrode 2191of the second light emitting element ED2, the pixel electrode 1191 ofthe first light emitting element ED1, and the bridge electrode 195 maybe disposed on the same layer. The second protective layer 182 mayinclude an opening 2181 that overlaps the pixel electrode 2191 of thesecond light emitting element ED2 and the extension wire 600. The pixelelectrode 2191 of each second light emitting element ED2 may beconnected to the extension wire 600 through the opening 2181. Theextension wire 600 may be electrically connected to the second pixelcircuit portion PC2 through the bridge electrode 195. Thus, theextension wire 600 may electrically connect the second pixel circuitportion PC2 to the second light emitting elements ED2. At least a partof the second light emitting elements ED2 may be distanced away from thesecond pixel circuit portion PC2 rather than overlapping the secondpixel circuit portion PC2. The extension wire 600 may electricallyconnect the second light emitting elements ED2 and the second pixelcircuit portion PC2 that are separated from each other.

FIG. 3 illustrates that the second pixel circuit portion PC2 and thesecond light emitting element ED2 may be electrically connected by theextension wire 600, but the embodiments are not limited. The extensionwire 600 may be omitted, and the second light emitting element ED2'spixel electrode 2191 may be extended and electrically connected to thesecond pixel circuit portion PC2 that is positioned at a distance. Thepixel electrodes 2191 of the second light emitting elements ED2 mayextend, and may be connected to a second pixel circuit portion PC2 bybypassing adjacent pixels to avoid collision with the adjacent pixels.However, in case that the extension wire 600 is omitted, complicateddesigns may be required to extend the pixel electrode 2191, and to avoidshort circuit failures. In case that an extension wire 600 may be used,the extension wire 600 and the pixel electrode 2191 of the second lightemitting element ED2 may be disposed on different layers. Thus, the wiredesign may be simplified, and short circuit failures may be prevented.

A partitioning wall 350 may be disposed on the pixel electrode 2191 ofthe second light emitting element ED2. A pixel opening 2351 may beformed in the partitioning wall 350, and the pixel opening 2351 of thepartitioning wall 350 may overlap the pixel electrode 2191.

An emission layer 2370 of the second light emitting element ED2 may bedisposed in the pixel opening 2351 of the partitioning wall 350. Theemission layer 2370 may overlap the pixel electrode 2191.

A common electrode 270 may be disposed on the emission layer 2370 andthe partitioning wall 350. The common electrode 270 of the second lightemitting element ED2 and the common electrode 270 of the first lightemitting element ED1 may be integral with each other, and may bepositioned as a whole in most regions on the substrate 110.

The second light emitting element ED2 emits light around a region wherethe pixel electrode 2191, the emission layer 2370, and the commonelectrode 270 overlap, and a light emission area of the second lightemitting element ED2 may or may not overlap a second pixel circuitportion PC2 electrically connected to the second light emitting elementED2.

In the display device according to the embodiment, the second lightemitting element ED2 may be disposed not only in an area where thesecond pixel circuit portion PC2 is disposed but also in an area wherethe driving circuit portion DR is disposed. Thus, the region where thescreen is displayed can be expanded. The pixel density in the seconddisplay area DA2 may be relatively lower than the pixel density in thefirst display area DA1. The size of the second light emitting elementED2 may be increased to increase luminance of the second light emittingelement ED2 to compensate for the decreased pixel density. Accordingly,in order to supply more current to the second light emitting elementED2, the size of each element such as the storage capacitor included inthe second pixel circuit portion PC2 may be large. The area occupied bythe second pixel circuit portion PC2 may be widened. For example, thearea of a second pixel circuit portion PC2 may be about twice an area ofa first pixel circuit portion PC1. The area of the second light emittingelement ED2 may be about twice the area of the first light emittingelement ED1. However, this is only an example, and areas of the secondpixel circuit portion PC2 and the second light emitting element ED2 maybe set in various ways.

The second light emitting elements ED2 may be electrically connected toa second pixel circuit portion PC2 such that resolution of the seconddisplay area DA2 can be substantially increased. The resolution of thesecond display area DA2 may be set to be similar to the resolution ofthe first display area DA1.

Although the first and second pixel circuit portions PC1 and PC2 havebeen illustrated with only one transistor, the first and second pixelcircuit portions PC1 and PC2 may include multiple transistors.Hereinafter, an example of a pixel of the display device according tothe embodiment will be described.

FIG. 5 is a schematic diagram an equivalent circuit of a pixel of adisplay device according to an embodiment.

As shown in FIG. 5 , a display device an embodiment includes pixels PXthat can display an image, and signal lines 127, 151, 152, 153, 154,171, and 172. A pixel PX may include a multiple transistors T1, T2, T3,T4, T5, T6, and T7 connected to signal lines 127, 151, 152, 153, 154,171, and 172, a capacitor Cst, and at least one light emitting diodeLED. In the embodiment, each pixel PX will be illustrated as including asingle light emitting diode LED.

The signal lines 127, 151, 152, 154, 155, 171, and 172 may include aninitialization voltage line 127, scan lines 151, 152, and 154, a lightemission control line 155, a data line 171, and a driving voltage line172.

The initialization voltage line 127 may transmit an initializationvoltage Vint. The scan lines 151, 152, and 154 may respectively transmitscan signals GWn, GIn, and GI(n+1). The scan signals GWn, GIn, andGI(n+1) may be a gate-on voltage and a gate-off voltage for turningon/turning off the transistors T2, T3, T4, and T7 included in the pixelPX.

The scan lines 151, 152, and 154 connected to a pixel PX may include afirst scan line 151 that can transmit the scan signal GWn, a second scanline 152 that can transmit the scan signal GIn having a gate-on voltageat different timing from that of the first scan line 151, and a thirdscan line 154 that can transmit the scan signal GI(n+1). In theembodiment, an example in which the second scan line 152 transmits thegate-on voltage at earlier timing than the first scan line 151 will bemainly described. For example, when the scan signal GWn is the n-th scansignal Sn (n is a natural number greater than 1) applied during a frame,the scan signal GIn may be a previous stage scan signal such as an(n−1)th scan signal S(n−1) and the scan signal GI(n+1) may be the(n+1)th scan signal S(n+1). However, the embodiment is not limitedthereto, and the scan signal GI(n+1) may be a different scan signal fromthe n-th scan signal (Sn).

The light emission control line 155 may transmit a control signal suchas a light emission control signal EM that may control light emission ofthe light emitting diode LED included in the pixel PX. A control signaltransmitted by the light emission control line 155 may have a gate-onvoltage and a gate-off voltage, and may have a different waveform from ascan signal transmitted by the scan line 151, 152, and 154.

The data line 171 may transmit a data signal Dm, and the driving voltageline 172 may transmit a driving voltage ELVDD. The data signal Dm mayhave a different voltage level according to an image signal input to thedisplay device, and the driving voltage ELVDD may have a substantiallyconstant level.

Although not illustrated, the display device may further include adriving circuit portion that transmits a signal to the signal lines 127,151, 152, 153, 154, 171, and 172.

Transistors included in a pixel PX may include a first transistor T1, asecond transistor T2, a third transistor T3, a fourth transistor T4, afifth transistor T5, a sixth transistor T6, and a seventh transistor T7.

The first scan line 151 may transmit a scan signal GWn to the secondtransistor T2 and the third transistor T3, the second scan line 152 maytransmit a scan signal GIn to the fourth transistor T4, the third scanline 154 may transmit a scan signal GI(n+1) to the seventh transistorT7, and the light emission control line 155 may transmit a lightemission control signal EM to the fifth transistor T5 and the sixthtransistor T6.

A gate electrode G1 of the first transistor T1 may be electricallyconnected to a first end of the capacitor Cst through the driving gatenode GN, a first electrode Ea1 of the first transistor T1 may beelectrically connected to the driving voltage line 172 via the fifthtransistor T5, and a second electrode Eb1 of the first transistor T1 maybe electrically connected to an anode of the light emitting diode LEDvia the sixth transistor T6. The first transistor T1 may receive thedata signal Dm transmitted by the data line 171 according to a switchingoperation of the second transistor T2 and may supply a driving currentId to the light emitting diode LED.

A gate electrode G2 of the second transistor T2 may be electricallyconnected to the first scan line 151, a first electrode Ea2 of thesecond transistor T2 may be electrically connected to the data line 171,and a second electrode Eb2 of the second transistor T2 may beelectrically connected to the first electrode Ea1 of the firsttransistor T1, and electrically connected to the driving voltage line172 via the fifth transistor T5. The second transistor T2 may be turnedon according to the scan signal GWn transmitted through the first scanline 151, and may transmit the data signal Dm transmitted from the dataline 171 to the first electrode Ea1 of the first transistor T1.

A gate electrode G3 of the third transistor T3 may be electricallyconnected to the first scan line 151, and a first electrode Ea3 of thethird transistor T3 may be electrically connected to the secondelectrode Eb1 of the first transistor T1 and may be electricallyconnected to the anode of the light emitting diode LED via the sixthtransistor T6. A second electrode Eb3 of the third transistor T3 may beelectrically connected to a second electrode Eb4 of the fourthtransistor T4, the first end of the capacitor Cst, and the gateelectrode G1 of the first transistor T1. The third transistor T3 may beturned on according to the scan signal GWn received through the firstscan line 151, and the gate electrode G1 of the first transistor T1 andthe second electrode Eb1 may be electrically connected to each other todiode-connect the first transistor T1.

A gate electrode G4 of the fourth transistor T4 may be electricallyconnected to the second scan line 152, a first electrode Ea4 of thefourth transistor T4 may be electrically connected to a terminal of theinitialization voltage Vint, and a second electrode Eb4 of the fourthtransistor T4 may be electrically connected to the first end of thecapacitor Cst and the gate electrode G1 of the first transistor T1 viathe second electrode Eb3 of the third transistor T3. The fourthtransistor T4 is turned on by the scan signal GIn received through thesecond scan line 152 and transmits the initialization voltage Vint tothe gate electrode G1 of the first transistor T1, thereby performing aninitialization operation for initialization of a voltage of the gateelectrode G1 of the first transistor T1.

A gate electrode G5 of the fifth transistor T5 may be electricallyconnected to the light emission control line 155, a first electrode Ea5of the fifth transistor T5 may be electrically connected to the drivingvoltage line 172, and a second electrode Eb5 of the fifth transistor T5may be electrically connected to the first electrode Ea1 of the firsttransistor T1 and the second electrode Eb2 of the second transistor T2.

A gate electrode G6 of the sixth transistor T6 may be electricallyconnected to the light emission control line 155, a first electrode Ea6of the sixth transistor T6 may be electrically connected to the secondelectrode Eb1 of the first transistor T1 and the first electrode Ea3 ofthe third transistor T3, and a second electrode Eb6 of the sixthtransistor T6 may be electrically connected to the anode of lightemitting diode LED. The fifth transistor T5 and the sixth transistor T6are simultaneously turned on by the light emission control signal EMreceived through the light emission control line 155, and thus thedriving voltage ELVDD is compensated through the diode-connected firsttransistor T1 and transmitted to the light emitting diode LED.

A gate electrode G7 of the seventh transistor T7 may be electricallyconnected to the third scan line 154, a first electrode Ea7 of theseventh transistor T7 may be electrically connected to the secondelectrode Eb6 of the sixth transistor T6 and the anode of the lightemitting diode LED, and a second electrode Eb7 of the seventh transistorT7 may be electrically connected to the initialization voltage Vintterminal and the first electrode Ea4 of the fourth transistor T4.

The transistors T1, T2, T3, T4, T5, T6, and T7 may be P-type channeltransistors such as PMOS, but are not limited thereto, and at least onemay be an N-type channel transistor.

The first end of the capacitor Cst may be electrically connected to thegate electrode G1 of the first transistor T1 as described above, and asecond end may be electrically connected to the driving voltage line172. A cathode of the light emitting diode LED may be electricallyconnected to the common voltage ELVSS terminal, which transmits thecommon voltage ELVSS to receive the common voltage ELVSS.

A pixel positioned in the first display area DA1 and a pixel positionedin the second display area DA2 may both have a circuit structure of thepixel PX shown in FIG. 5 . However, the embodiments are not limitedthereto, and a circuit structure of a pixel positioned in the firstdisplay area DA1 may be different from a circuit structure of a pixelpositioned in the second display area DA2. The circuit diagram of thepixel shown in FIG. 5 is only an example, and the number of transistors,the number of capacitors, and their connection relationships included ina pixel PX of the display device according to the embodiment can bechanged.

In the display device according to the embodiment, each first pixelcircuit portion PC1 may be electrically connected to a first lightemitting element ED1, and each second pixel circuit portion PC2 may beelectrically connected to multiple second light emitting elements ED2.The first light emitting element ED1 and the second light emittingelement ED2 may be disposed in various forms. Hereinafter, arrangementforms of the first pixel circuit portion PC1 and the first lightemitting element ED1, arrangement forms of the second pixel circuitportion PC2 and the second light emitting element ED2, and theconnections of the second light emitting elements ED2 will be described.

Referring to FIG. 6 , the arrangement form of the first pixel circuitportion PC1 and the first light emitting element ED1 will be describedas follows.

FIG. 6 shows the arrangement form of the first pixel circuit portion ofthe display device and the arrangement form of the first light emittingelement, respectively, according to an embodiment. In FIG. 6 , forconvenience of description, the first pixel circuit portion PC1 and thefirst light emitting element ED1 are illustrated separately, but thefirst pixel circuit portion PC1 may overlap the first light emittingelement ED1 in a plan view.

As shown in FIG. 6 , first light emitting elements ED1 may be disposedalong the first direction DR1 and the second direction DR2 on the firstdisplay area of the substrate of the display device according to theembodiment. The second direction DR2 may be perpendicular to the firstdirection DR1. The first direction DR1 may be a row direction, and thesecond direction DR2 may be a column direction. The first pixel circuitportions PC1 may be disposed along the first direction DR1 and thesecond direction DR2 on the first display area of the substrate of thedisplay device according to an embodiment. The first pixel circuitportions PC1 disposed in the first direction DR1 may be electricallyconnected to the same scan line, and the first pixel circuit portionsPC1 disposed in the second direction DR2 may be electrically connectedto the same data line.

The first light emitting element ED1 may include a first sub-lightemitting element E1R, a second sub-light emitting element EiB, a thirdsub-light emitting element ElG1, and a fourth sub-light emitting elementE1G2. Each of the first sub-light emitting element E1R, the secondsub-light emitting element EiB, the third sub-light emitting elementElG1, and the fourth sub-light emitting element E1G2 may emit light of aselected color. For example, the first sub-light emitting element E1Rmay emit red light, and the second sub-light emitting element EiB mayemit blue light. The third sub-light emitting element ElG1 and thefourth sub-light emitting element E1G2 may emit green light. The firstsub-light emitting element E1R and the third sub-light emitting elementElG1 may be adjacent in the first direction DR1, and the secondsub-light emitting element EiB and the fourth sub-light emitting elementE1G2 may be adjacent in the first direction DR1. The first sub-lightemitting element E1R and the second sub-light emitting element EiB maybe adjacent in the second direction DR2, and the third sub-lightemitting element ElG1 and the fourth sub-light emitting element E1G2 maybe adjacent in the second direction DR2.

The first pixel circuit portion PC1 may include a first sub-pixelcircuit portion P1R, a second sub-pixel circuit portion P1B, a thirdsub-pixel circuit portion P1G1, and a fourth sub-pixel circuit portionP1G2. The first sub-pixel circuit portion P1R may be electricallyconnected to the first sub-light emitting element E1R, and they mayoverlap each other. The second sub-pixel circuit portion P1B may beelectrically connected to the second sub-light emitting element EiB, andthey may overlap each other. The third sub-pixel circuit portion P1G1may be electrically connected to the third sub-light emitting elementElG1, and they may overlap each other. The fourth sub-pixel circuitportion P1G2 may be electrically connected to the fourth sub-lightemitting element E1G2, and they may overlap each other. The first pixelcircuit portion PC1 may overlap and may be electrically connected to thefirst light emitting element ED1. The first sub-pixel circuit portionP1R and the third sub-pixel circuit portion P1G1 may be adjacent in thefirst direction DR1, and the second sub-pixel circuit portion P1B andthe fourth sub-pixel circuit portion P1G2 may be adjacent in the firstdirection DR1. The first sub-pixel circuit portion P1R and the secondsub-pixel circuit portion P1B may be adjacent in the second directionDR2, and the third sub-pixel circuit portion P1G1 and the fourthsub-pixel circuit portion P1G2 may be adjacent in the second directionDR2.

Four sub-pixel circuit portions P1R, P1B, P1G1, and P1G2 and foursub-light emitting elements E1R, ElB, ElG1, and ElG2 may form one pixelgroup. Multiple pixel groups may be repeatedly disposed in the firstdisplay area.

Referring to FIG. 7 and FIG. 8 , when each second pixel circuit portionPC2 is electrically connected to two second light emitting elements ED2,the arrangement form of the second pixel circuit portion PC2 and thesecond light emitting elements ED2 and the electrical connection of thesecond light emitting elements ED2 will be described as follows.

FIG. 7 shows an arrangement form of the second pixel circuit portion ofthe display device and an arrangement form of the second light emittingelement, respectively, according to the embodiment. In FIG. 7 , thesecond pixel circuit portion PC2 and the second light emitting elementED2 are separated for convenience of description, but substantially, thesecond pixel circuit portion PC2 may overlap some of the second lightemitting elements ED2 in a plan view. FIG. 8 shows the electricalconnection of the second light emitting elements ED2 of the displaydevice according to the embodiment.

As shown in FIG. 7 and FIG. 8 , second light emitting elements ED2 maybe disposed along the first direction DR1 and the second direction DR2on the second display area of the substrate of the display deviceaccording to the embodiment. Second pixel circuit portions PC2 may bedisposed along the first direction DR1 and the second direction DR2 onthe second display area DA2 (refer to FIG. 1 ) of the substrate of thedisplay device according to an embodiment. The second pixel circuitportions PC2 disposed along the first direction DR1 may be electricallyconnected to the same scan line, and the second pixel circuit portionsPC2 disposed along the second direction DR2 may be electricallyconnected to the same data line.

The second light emitting element ED2 may include a first sub-lightemitting element E2R, a second sub-light emitting element E2B, a thirdsub-light emitting element E2G1, and a fourth sub-light emitting elementE2G2. The first sub-light emitting element E2R, the second sub-lightemitting element E2B, the third sub-light emitting element E2G1, and thefourth sub-light emitting element E2G2 may respectively emit light ofselected colors. For example, the first sub-light emitting element E2Rmay emit red light, and the second sub-light emitting element E2B mayemit blue light. The third sub-light emitting element E2G1 and thefourth sub-light emitting element E2G2 may emit green light. In a firstrow, the first sub-light emitting element E2R, the third sub-lightemitting element E2G1, the second sub-light emitting element E2B, andthe third sub-light emitting element E2G1 may be sequentially disposedalong the first direction DR1. In a second row, the second sub-lightemitting element E2B, the fourth sub-light emitting element E2G2, thefirst sub-light emitting element E2R, and the fourth sub-light emittingelement E2G2 may be sequentially disposed along the first direction DR1.The first sub-light emitting element E2R and the second sub-lightemitting element E2B may be adjacent in the second direction DR2, andthe third sub-light emitting element E2G1 and the fourth sub-lightemitting element E2G2 may be adjacent in the second direction DR2.

The second pixel circuit portion PC2 may include a first sub-pixelcircuit portion P2R, a second sub-pixel circuit portion P2B, a thirdsub-pixel circuit portion P2G1, and a fourth sub-pixel circuit portionP2G2. The first sub-pixel circuit portion P2R may be electricallyconnected to two first sub-light emitting elements E2R. The secondsub-pixel circuit portion P2B may be electrically connected to twosecond sub-light emitting elements E2B. The third sub-pixel circuitportion P2G1 may be electrically connected to two third sub-lightemitting elements E2G1. The fourth sub-pixel circuit portion P2G2 may beelectrically connected to two fourth sub-light emitting elements E2G2.The second pixel circuit portion PC2 may not overlap the electricallyconnected second light emitting elements ED2. The second pixel circuitportion PC2 may overlap a second light emitting element ED2 that is notelectrically connected the second pixel circuit portion PC2. The firstsub-pixel circuit portion P2R and the third sub-pixel circuit portionP2G1 may be adjacent in the first direction DR1, and the secondsub-pixel circuit portion P2B and the fourth sub-pixel circuit portionP2G2 may be adjacent in the first direction DR1. The first sub-pixelcircuit portion P2R and the second sub-pixel circuit portion P2B may beadjacent in the second direction DR2, and the third sub-pixel circuitportion P2G1 and the fourth sub-pixel circuit portion P2G2 may beadjacent in the second direction DR2.

The two first sub-light emitting elements E2R electrically connected tothe first sub-pixel circuit portion P2R may be disposed along the thirddirection DR3. For example, two first sub-light emitting elements E2Radjacent along the third direction DR3 may be electrically connected toeach other to receive the same signal and exhibit the same luminance.The third direction DR3 may be an oblique direction with respect to thefirst direction DR1 and the second direction DR2. The two secondsub-light emitting elements E2B electrically connected to the secondsub-pixel circuit portion P2B may be disposed along a fourth directionDR4. For example, two second sub-light emitting elements E2B adjacentalong the fourth direction DR4 may be electrically connected to eachother to receive the same signal and exhibit the same luminance. Thefourth direction DR4 may be an oblique direction with respect to thefirst direction DR1 and the second direction DR2. The fourth directionDR4 may be a direction perpendicular to the third direction DR3. The twothird sub-light emitting elements E2G1 electrically connected to thethird sub-pixel circuit portion P2G1 may be disposed along the firstdirection DR1. For example, two third sub-light emitting elements E2G1adjacent along the first direction DR1 may be electrically connected toeach other to receive the same signal and exhibit the same luminance.The two fourth sub-light emitting elements E2G2 electrically connectedto the fourth sub-pixel circuit portion P2G2 may be disposed along thefirst direction DR1. For example, two fourth sub-light emitting elementsE2G2 adjacent along the first direction DR1 may be electricallyconnected to each other to receive the same signal and exhibit the sameluminance.

Four sub-pixel circuit portions P2R, P2B, P2G1, and P2G2 and eightsub-light emitting elements E2R, E2B, E2G1, and E2G2 may form a pixelgroup PXGr. Multiple pixel groups PXGr may be repeatedly disposed in thesecond display area. A second pixel circuit portion PC2 of a first pixelgroup PXGr positioned at the leftmost side may be electrically connectedto a second light emitting elements ED2 of the first pixel group PXGr.The second pixel circuit portion PC2 of the first pixel group PXGr maynot overlap the second light emitting elements ED2 of the first pixelgroup PXGr. The second pixel circuit portion PC2 of the first pixelgroup PXGr may overlap at least a portion of the second light emittingelements ED2 of a fourth pixel group PXGr. The second pixel circuitportion PC2 of the second pixel group PXGr may overlap at least aportion of the second light emitting element ED2 of the fourth pixelgroup PXGr. A second pixel circuit portion PC2 of third and fourth pixelgroups PXGr may overlap at least a portion of a second light emittingelement ED2 of a fifth pixel group PXGr. A second pixel circuit portionPC2 of fifth and sixth pixel groups PXGr may overlap at least a portionof a second light emitting element ED2 of a sixth pixel group PXGr.

Hereinafter, referring to FIG. 9 and FIG. 10 , an arrangementrelationship between the first pixel circuit portion PC1 and the secondpixel circuit portion PC2 and an arrangement relationship between thefirst light emitting element ED1 and the second light emitting elementED2 will be described.

FIG. 9 and FIG. 10 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion, and an arrangement form ofthe first light emitting element and the second light emitting element.FIG. 9 illustrates second light emitting elements ED2 positioned in astraight line portion STR (refer to FIG. 1 ) of the display area DA ofwhich an edge has a straight line shape, and light emitting elements ED1and ED2 adjacent thereto in the first direction DR1. FIG. 10 illustratessecond light emitting elements ED2 positioned in a rounded portion RND(refer to FIG. 1 ) of the display area DA of which an edge has a roundedshape, and light emitting elements ED1 and ED2 adjacent thereto in thefirst direction DR1.

As shown in FIG. 9 and FIG. 10 , the arrangement form of the secondlight emitting element ED2 positioned in the straight line portion STR(refer to FIG. 1 ) is different from the arrangement form of the secondlight emitting element ED2 positioned in the rounded portion RND (referto FIG. 1 ).

Two second light emitting elements ED2 are electrically connected to onesecond pixel circuit portion PC2. Eight second light emitting elementsED2 adjacent to each other in the first direction DR1 and the seconddirection DR2 may form one second light emitting element group EDGr2. Ineach second light emitting element group EDGr2, the eight second lightemitting elements ED2 may be arranged in a matrix format of 2×4. Secondlight emitting element groups EDGr2 may be disposed in a matrix formatalong the first direction DR1 and the second direction DR2. The secondlight emitting element group EDGr2 may include two first sub-lightemitting elements E2R, two second sub-light emitting elements E2B, twothird sub-light emitting elements E2G1, and two fourth sub-lightemitting elements E2G2.

One first light emitting element ED1 is connected to one first pixelcircuit portion PC1. Four second light emitting elements ED1 adjacent toeach other in the first direction DR1 and the second direction DR2 mayform one first light emitting element group EDGr1. First light emittingelement groups EDGr1 may be disposed in a matrix format along the firstdirection DR1 and the second direction DR2. The first light emittingelement group EDGr1 may include one first sub-light emitting elementE1R, one second sub-light emitting element E1B, one third sub-lightemitting element ElG1, and one fourth sub-light emitting element E1G2.

In the first row, six second light emitting element groups EDGr2 aredisposed along the first direction DR1, and following the sixth secondlight emitting element groups EDGr2, the first light emitting elementgroup EDGr1 is disposed along the first direction DR1. The number ofsecond light emitting element groups EDGr2 is not limited thereto, andmay be changed. In the second row, six second light emitting elementgroups EDGr2 are disposed along the first direction DR1, and followingthe sixth second light emitting element group EDGr2, the first lightemitting element group EDGr1 may be disposed along the first directionDR1.

In the straight line portion STR (refer to FIG. 1 ), edges of secondlight emitting element groups EDGr2 that are adjacent to each other inthe second direction DR2 are aligned. In the rounded portion RND (referto FIG. 1 ), edges of second light emitting element groups EDGr2 thatare adjacent to each other in the second direction DR2 may be shiftedand thus they may not align. In the second row, as the second lightemitting element groups EDGr2 may be shifted to the right, the number offirst light emitting element groups EDGr1 may be reduced. A distance atwhich edges of second light emitting element groups EDGr2 that areadjacent to each other in the second direction DR2 are shifted in therounded portion RND (refer to FIG. 1 ) may correspond to two widths ofthe second light emitting element ED2. In the second row, the number offirst light emitting element groups EDGr1 may be reduced by one comparedto the first row.

Hereinafter, referring to FIG. 11 , an embodiment in which thearrangement relationship between the first pixel circuit portion PC1 andthe second pixel circuit portion PC2 and the arrangement relationshipbetween the first light emitting element ED1 and the second lightemitting element ED2 are partially modified will be described.

FIG. 11 show an arrangement form of the first pixel circuit portion andthe second pixel circuit portion, and an arrangement form of the firstlight emitting elements ED1 and the second light emitting elements ED2.FIG. 11 illustrates second light emitting elements ED2 positioned in arounded portion RND (refer to FIG. 1 ), which are rounded edges of thedisplay area DA. Adjacent first and second light emitting elements ED1and ED2 in the first direction DR1 are also illustrated. The lightemitting elements in the straight line portion STR (refer to FIG. 1 )may be disposed the same as in FIGS. 9 and 10 .

As shown in FIG. 11 , in the rounded portion RND (refer to FIG. 1 ), theedges of the second light emitting element groups EDGr2 that areadjacent to each other in the second direction DR2 may be shifted andthus they do not align. In the second row, as the second light emittingelement groups EDGr2 are shifted to the right, the first light emittingelement group EDGr1 may be shifted to the right. A distance at whichedges of second light emitting element groups EDGr2 that are adjacent toeach other in the second direction DR2 are shifted in the roundedportion RND (refer to FIG. 1 ) may correspond to one width of a singlesecond light emitting element ED2.

For comparison with the display device according to the embodiments, acomparative example display device may implement a rounded portion RND(refer to FIG. 1 ) by reducing the number of second light emittingelement groups EDGr2 positioned in the second row by one. In thecomparative example, display device the second light emitting elementgroups EDGr2 that are adjacent to each other in the second direction DR2are shifted four widths of a single second light emitting element ED2.As the shifted distance increases, step shape may be visible in therounded portion RND (refer to FIG. 1 ), and the edge may not appear as asmooth curved line. The display device according to the embodiments mayprevent such a step shape from being visible in the rounded portion RND(refer to FIG. 1 ) by reducing the shift distance. The edge of thedisplay device may be implemented as a smooth curved line.

Referring to FIG. 12 and FIG. 13 , in an embodiment, each second pixelcircuit portion PC2 may be connected to three second light emittingelements ED2. The arrangement form of the second pixel circuit portionPC2 and the second light emitting elements ED2, and their electricalconnections will be described.

FIG. 12 shows an arrangement form of the second pixel circuit portion ofthe display device and an arrangement form of the second light emittingelement, respectively, according to an embodiment. In FIG. 12 , forconvenience of description, the second pixel circuit portion PC2 and thesecond light emitting element ED2 are illustrated separately, but thesecond pixel circuit portion PC2 may overlap some of the second lightemitting elements ED2 in a plan view. FIG. 13 illustrates an electricalconnection of the second light emitting elements ED2 of the displaydevice according to the embodiment.

As shown in FIG. 12 and FIG. 13 , second light emitting elements ED2 maybe disposed along a first direction DR1 and a second direction DR2 on asecond display area of a substrate of the display device according tothe embodiment. Second pixel circuit portions PC2 may be disposed in azigzag form on the second display area of the substrate of the displaydevice according to the embodiment. Second pixel circuit portions PC2disposed along the first direction DR1 may be electrically connected tothe same scan line. Although not shown, second pixel circuit portionsPC2 may be disposed along the second direction DR2, and may beelectrically connected to the same data line.

The second light emitting element ED2 may include a first sub-lightemitting element E2R, a second sub-light emitting element E2B, a thirdsub-light emitting element E2G1, and a fourth sub-light emitting elementE2G2. Each of the first sub-light emitting element E2R, the secondsub-light emitting element E2B, the third sub-light emitting elementE2G1, and the fourth sub-light emitting element E2G2 may emit light of aselected color. For example, the first sub-light emitting element E2Rmay emit red light, and the second sub-light emitting element E2B mayemit blue light. The third sub-light emitting element E2G1 and thefourth sub-light emitting element E2G2 may emit green light. In a firstrow, the first sub-light emitting element E2R, the third sub-lightemitting element E2G1, the second sub-light emitting element E2B, andthe third sub-light emitting element E2G1 may be sequentially disposedalong the first direction DR1. In a second row, the second sub-lightemitting element E2B, the fourth sub-light emitting element E2G2, thefirst sub-light emitting element E2R, and the fourth sub-light emittingelement E2G2 may be sequentially disposed along the first direction DR1.The first sub-light emitting element E2R and the second sub-lightemitting element E2B may be adjacent in the second direction DR2, andthe third sub-light emitting element E2G1 and the fourth sub-lightemitting element E2G2 may be adjacent in the second direction DR2.

The second pixel circuit portion PC2 may include a first sub-pixelcircuit portion P2R, a second sub-pixel circuit portion P2B, a thirdsub-pixel circuit portion P2G1, and a fourth sub-pixel circuit portionP2G2. The first sub-pixel circuit portion P2R may be electricallyconnected to three first sub-light emitting elements E2R. The secondsub-pixel circuit portion P2B may be electrically connected to threesecond sub-light emitting elements E2B. The third sub-pixel circuitportion P2G1 may be electrically connected to three third sub-lightemitting elements E2G1. The fourth sub-pixel circuit portion P2G2 may beelectrically connected to three fourth sub-light emitting elements E2G2.The second pixel circuit portion PC2 may not overlap its electricallyconnected second light emitting element ED2. The second pixel circuitportion PC2 may overlap, in a plan view, a second light emitting elementED2 to which it is not electrically connected. The first sub-pixelcircuit portion P2R and the second sub-pixel circuit portion P2B may beadjacent in the first direction DR1, and the third sub-pixel circuitportion P2G1 and the fourth sub-pixel circuit portion P2G2 may beadjacent in the first direction DR1. The first sub-pixel circuit portionP2R and the third sub-pixel circuit portion P2G1 may be adjacent in thethird direction DR3, and the second sub-pixel circuit portion P2B andthe fourth sub-pixel circuit portion P2G2 may be adjacent in the thirddirection DR3. The first sub-pixel circuit portion P2R, the thirdsub-pixel circuit portion P2G1, the second sub-pixel circuit portionP2B, and the fourth sub-pixel circuit portion P2G2 may be disposed in azigzag form. In the embodiment, since an area occupied by the secondpixel circuit portion PC2 can be designed to have a wider area than inother examples, sufficient capacitance can be provided.

The three first sub-light emitting elements E2R electrically connectedto the first sub-pixel circuit portion P2R may be positioned at eachvertex of a triangle.

Each of the sides of the imaginary triangle may be parallel to the firstdirection DR1, the third direction DR3, and the fourth direction DR4.The adjacent three first sub-light emitting elements E2R may beelectrically connected to each other to receive the same signal andexhibit the same luminance. The three second sub-light emitting elementsE2B electrically connected to the second sub-pixel circuit portion P2Bmay be positioned at each vertex of the imaginary triangle. Each side ofthe imaginary triangle may be parallel to the first direction DR1, thethird direction DR3, and the fourth direction DR4. The adjacent threesecond sub-light emitting elements E2B may be electrically connected toeach other to receive the same signal and exhibit the same luminance.The third sub-light emitting element E2G1 electrically connected to thethird sub-pixel circuit portion P2G1 may be disposed along the firstdirection DR1. For example, the three third sub-light emitting elementsE2G1 adjacent along the first direction DR1 are electrically connectedto each other to receive the same signal and exhibit the same luminance.Three fourth sub-light emitting elements E2G2 electrically connected tothe fourth sub-pixel circuit portion P2G2 may be disposed along thefirst direction DR1. The three fourth sub-light emitting elements E2G2adjacent along the first direction DR1 may be electrically connected toeach other to receive the same signal and exhibit the same luminance.

Four sub-pixel circuit portions P2R, P2B, P2G1, and P2G2 and twelvesub-light emitting elements E2R, E2B, E2G1, and E2G2 may form one pixelgroup PXGr. Pixel groups PXGr may be repeatedly disposed in the seconddisplay area. The second pixel circuit portion PC2 of a first pixelgroup PXGr positioned at the leftmost side may be electrically connectedto second light emitting elements ED2 of the first pixel group PXGr. Ina plan view, the second pixel circuit portion PC2 of the first pixelgroup PXGr may not overlap the second light emitting elements ED2 of thefirst pixel group PXGr. The second pixel circuit portion PC2 of thefirst pixel group PXGr may overlap at least a portion of the secondlight emitting element ED2 of the second pixel group PXGr. A secondpixel circuit portion PC2 of a second pixel group PXGr may overlap atleast a portion of a second light emitting element ED2 of a third pixelgroup PXGr. A second pixel circuit portion PC2 of a third pixel groupPXGr may overlap at least a portion of the second light emitting elementED2 of the third pixel group PXGr, and may overlap at least a part of asecond light emitting element ED2 of a fourth pixel group PXGr. A secondpixel circuit portion PC2 of the fourth pixel group PXGr may overlap atleast a portion of the second light emitting element ED2 of the fourthpixel group PXGr, in a plan view.

Hereinafter, referring to FIG. 14 and FIG. 15 , an arrangementrelationship between the first pixel circuit portion PC1 and the secondpixel circuit portion PC2 and an arrangement relationship between thefirst light emitting element ED1 and the second light emitting elementED2 will be described.

FIG. 14 and FIG. 15 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion and an arrangement form ofthe first light emitting elements ED1 and the second light emittingelements ED2. FIG. 14 shows second light emitting elements ED2positioned in a straight line portion STR (refer to FIG. 1 ) of thedisplay area DA of which an edge has a straight line shape, and lightemitting elements ED1 and ED2 adjacent thereto in the first directionDR1. FIG. 15 shows second light emitting elements ED2 positioned in arounded portion RND (refer to FIG. 1) of the display area DA of which anedge has a rounded shape, and first and second light emitting elementsED1 and ED2 adjacent to the rounded portion RND (refer to FIG. 1 ) inthe first direction DR1.

As shown in FIG. 14 and FIG. 15 , the arrangement form of the secondlight emitting element ED2 positioned in the straight line portion STR(refer to FIG. 1 ) may be different from the arrangement form of thesecond light emitting element ED2 positioned in the rounded portion RND(refer to FIG. 1 ).

Three second light emitting elements ED2 are connected to one secondpixel circuit portion PC2. Twelve second light emitting elements ED2adjacent to each other in the first direction DR1 and the seconddirection DR2 may form one second light emitting element group EDGr2. Ineach second light emitting element group EDGr2, the twelve second lightemitting elements ED2 may be arranged in a matrix format of 2×6. Secondlight emitting element groups EDGr2 may be disposed in a matrix formatalong the first direction DR1 and the second direction DR2. The secondlight emitting element group EDGr2 may include three first sub-lightemitting elements E2R, three second sub-light emitting elements E2B,three third sub-light emitting elements E2G1, and three fourth sub-lightemitting elements E2G2.

One first light emitting element ED1 is connected to one first pixelcircuit portion PC1. Four second light emitting elements ED1 adjacent toeach other in the first direction DR1 and the second direction DR2 mayform one first light emitting element group EDGr1. The first lightemitting element groups EDGr1 may be disposed in a matrix format alongthe first direction DR1 and the second direction DR2. The first lightemitting element group EDGr1 may include one first sub-light emittingelement E1R, one second sub-light emitting element E1B, one thirdsub-light emitting element ElG1, and one fourth sub-light emittingelement E1G2.

In the first row, three second light emitting element groups EDGr2 aredisposed along the first direction DR1, and following third second lightemitting element groups EDGr2, the first light emitting element groupEDGr1 is disposed along the first direction DR1. The number of secondlight emitting element groups EDGr2 is not limited thereto, and may bechanged. In the second row, three second light emitting element groupsEDGr2 are disposed along the first direction DR1, and following thethird second light emitting element group (EDGr2), the first lightemitting element group EDGr1 may be disposed along the first directionDR1.

In the straight line portion STR (refer to FIG. 1 ), edges of secondlight emitting element groups EDGr2 that are adjacent to each other inthe second direction DR2 are aligned. In the rounded portion RND (referto FIG. 1 ), edges of second light emitting element groups EDGr2 thatare adjacent to each other in the second direction DR2 are shifted andthus the edges do not align. In the second row, as the second lightemitting element groups EDGr2 are shifted to the right, the number offirst light emitting element groups EDGr1 may be reduced. A distance atwhich edges of adjacent second light emitting element groups EDGr2 areshifted in the rounded portion RND (refer to FIG. 1 ) may correspond tofour widths of the second light emitting element ED2. In the second row,the number of first light emitting element groups EDGr1 is reduced byone compared to the first row.

Referring to FIG. 16 , in other embodiments, the arrangement of thefirst pixel circuit portion PC1 and the second pixel circuit portion PC2and the arrangement of the first light emitting elements ED1 and thesecond light emitting elements ED2 may be modified.

FIG. 16 shows an arrangement form of the first pixel circuit portion andthe second pixel circuit portion and an arrangement form of the firstlight emitting elements ED1 and the second light emitting elements ED2.FIG. 16 illustrates second light emitting elements ED2 positioned in therounded portions RND (refer to FIG. 1 ), which are the rounded edges ofthe display area DA. The light emitting elements ED1 and ED2 aredisposed adjacent to the rounded edge of the display area in the firstdirection DR1. The first and second light emitting elements ED1 and ED2disposed in the straight line portion STR (refer to FIG. 1 ) arearranged similarly as the previous examples.

As shown in FIG. 16 , in the rounded portion RND (refer to FIG. 1 ), theedges of the second light emitting element groups EDGr2 that areadjacent to each other in the second direction DR2 are shifted and thusthey are not aligned. In the second row, as the second light emittingelement groups EDGr2 are shifted to the right, the first light emittingelement group EDGr1 may be shifted to the right. The second lightemitting element groups EDGr2 that are adjacent to each other in thesecond direction may be shifted by two widths of the second lightemitting element ED2 in the rounded portion RND (refer to FIG. 1 ). Inthe second row, the number of first light emitting element groups EDGr1is reduced by one compared to the first row.

Compared to a display device according to an embodiment, a comparativeexample display device may implement the rounded portion RND (refer toFIG. 1 ) by removing an entire second light emitting element group EDGr2from the second row. In the comparative example, the distance the edgesof adjacent second light emitting element groups EDGr2 adjacent to eachother in the second direction are shifted corresponds to six widths of asingle second light emitting element ED2. As the shift distanceincreases, a step shape may become visible in the rounded portion RND(refer to FIG. 1 ), and the edge may not be implemented as a smoothcurved line. In the embodiment, it is possible to prevent the roundedportion RND (refer to FIG. 1 ) from becoming a step shape by reducingthe shift distance, and the edge can be implemented as a smooth curvedline.

Referring to the embodiments of FIG. 17 and FIG. 18 , each second pixelcircuit portion PC2 may be connected to four second light emittingelements ED2. The arrangement form of the second pixel circuit portionPC2 and the second light emitting element ED2, and the electricalconnections of the second light emitting element ED2 are illustrated.

FIG. 17 shows an arrangement form of the second pixel circuit portion ofthe display device and an arrangement form of the second light emittingelement, respectively, according to an embodiment. In FIG. 17 , forconvenience of description, the second pixel circuit portion PC2 and thesecond light emitting element ED2 are illustrated separately, but thesecond pixel circuit portion PC2 may overlap some of the second lightemitting elements ED2 in a plan view. FIG. 18 shows the electricalconnections of the second light emitting elements of the display deviceaccording to the embodiment.

As shown in FIG. 17 and FIG. 18 , second light emitting elements ED2 maybe disposed along a first direction DR1 and a second direction DR2 on asecond display area of a substrate of the display device according tothe embodiment. Second pixel circuit portions PC2 may be disposed in azigzag form on the second display area of the substrate of the displaydevice according to the embodiment. Second pixel circuit portions PC2disposed along the first direction DR1 may be electrically connected tothe same scan line. Although not shown, second pixel circuit portionsPC2 may be disposed along the second direction DR2, and they may beelectrically connected to the same data line.

The second light emitting element ED2 may include a first sub-lightemitting element E2R, a second sub-light emitting element E2B, a thirdsub-light emitting element E2G1, and a fourth sub-light emitting elementE2G2. Each of the first sub-light emitting element E2R, the secondsub-light emitting element E2B, the third sub-light emitting elementE2G1, and the fourth sub-light emitting element E2G2 may emit light of aselected color. For example, the first sub-light emitting element E2Rmay emit red light, and the second sub-light emitting element E2B mayemit blue light. The third sub-light emitting element E2G1 and thefourth sub-light emitting element E2G2 may emit green light. In a firstrow, the first sub-light emitting element E2R, the third sub-lightemitting element E2G1, the second sub-light emitting element E2B, andthe third sub-light emitting element E2G1 may be sequentially disposedalong the first direction DR1. In a second row, the second sub-lightemitting element E2B, the fourth sub-light emitting element E2G2, thefirst sub-light emitting element E2R, and the fourth sub-light emittingelement E2G2 may be sequentially disposed along the first direction DR1.The first sub-light emitting element E2R and the second sub-lightemitting element E2B may be adjacent in the second direction DR2, andthe third sub-light emitting element E2G1 and the fourth sub-lightemitting element E2G2 may be adjacent in the second direction DR2.

The second pixel circuit portion PC2 may include a first sub-pixelcircuit portion P2R, a second sub-pixel circuit portion P2B, a thirdsub-pixel circuit portion P2G1, and a fourth sub-pixel circuit portionP2G2. The first sub-pixel circuit portion P2R may be electricallyconnected to four first sub-light emitting elements E2R. The secondsub-pixel circuit portion P2B may be electrically connected to foursecond sub-light emitting elements E2B. The third sub-pixel circuitportion P2G1 may be electrically connected to four third sub-lightemitting elements E2G1. The fourth sub-pixel circuit portion P2G2 may beelectrically connected to four fourth sub-light emitting elements E2G2.The second pixel circuit portion PC2 may not overlap the electricallyconnected second light emitting elements ED2. The second pixel circuitportion PC2 may overlap other second light emitting elements ED2 thatare not connected to the second pixel circuit portion PC2. The firstsub-pixel circuit portion P2R and the second sub-pixel circuit portionP2B may be adjacent in the first direction DR1, and the third sub-pixelcircuit portion P2G1 and the fourth sub-pixel circuit portion P2G2 maybe adjacent in the first direction DR1. The first sub-pixel circuitportion P2R and the third sub-pixel circuit portion P2G1 may be adjacentin the third direction DR3, and the second sub-pixel circuit portion P2Band the fourth sub-pixel circuit portion P2G2 may be adjacent in thethird direction DR3. The first sub-pixel circuit portion P2R, the thirdsub-pixel circuit portion P2G1, the second sub-pixel circuit portionP2B, and the fourth sub-pixel circuit portion P2G2 may be disposed in azigzag form. In the embodiment, since an area occupied by the secondpixel circuit portion PC2 can be designed to be wider than in previousexamples, sufficient capacitance can be provided.

Four first sub-light emitting elements E2R electrically connected to thefirst sub-pixel circuit portion P2R may be disposed in a zigzag form.The four first sub-light emitting elements E2R may be electricallyconnected to each other along the third direction DR3 and the fourthdirection DR4 to receive the same signal and exhibit the same luminance.The four second sub-light emitting elements E2B electrically connectedto the second sub-pixel circuit portion P2B may be disposed in a zigzagform. The four second sub-light emitting elements E2B may beelectrically connected to each other along the fourth direction DR4 andthe third direction DR3 to receive the same signal and exhibit the sameluminance. The fourth third sub-light emitting elements E2G1electrically connected to the third sub-pixel circuit portion P2G1 maybe disposed along the first direction DR1. The four third sub-lightemitting elements E2G1 adjacent along the first direction DR1 areelectrically connected to each other to receive the same signal andexhibit the same luminance. The fourth sub-light emitting elements E2G2electrically connected to the fourth sub-pixel circuit portion P2G2 maybe disposed along the first direction DR1. The four fourth sub-lightemitting elements E2G2 adjacent along the first direction DR1 may beelectrically connected to each other to receive the same signal and mayexhibit the same luminance.

Four sub-pixel circuit portions P2R, P2B, P2G1, and P2G2 and sixteensub-light emitting elements E2R, E2B, E2G1, and E2G2 may form one pixelgroup PXGr. Pixel groups PXGr may be repeatedly disposed in the seconddisplay area. The second pixel circuit portion PC2 of a first pixelgroup PXGr positioned at the leftmost side may be electrically connectedto a second light emitting element ED2 of the first pixel group PXGr. Ina plan view, the second pixel circuit portion PC2 of the first pixelgroup PXGr may not overlap the second light emitting element ED2 of thefirst pixel group PXGr. The second pixel circuit portion PC2 of thefirst pixel group PXGr may overlap at least a portion of the secondlight emitting element ED2 of the second pixel group PXGr, in a planview. A second pixel circuit portion PC2 of a second pixel group PXGrmay overlap at least a portion of a second light emitting element ED2 ofa third pixel group PXGr, in a plan view.

Referring to FIG. 19 and FIG. 20 , an arrangement of the first pixelcircuit portion PC1 and the second pixel circuit portion PC2, and anarrangement of the first light emitting element ED1 and the second lightemitting element ED2 according to an embodiment will be described.

FIG. 19 and FIG. 20 show an arrangement form of the first pixel circuitportion and the second pixel circuit portion and an arrangement form ofthe first light emitting element and the second light emitting element.FIG. 19 shows second light emitting elements ED2 positioned in astraight line portion STR (refer to FIG. 1 ) of the edge of the displayarea DA which has a straight line shape, and first and second lightemitting elements ED1 and ED2 adjacent to the straight line portion STR(refer to FIG. 1 ) in the first direction DR1. FIG. 20 shows secondlight emitting elements ED2 positioned in a rounded portion RND (referto FIG. 1 ) of the edge of the display area DA which has a roundedshape, and light emitting elements ED1 and ED2 adjacent to the roundedportion RND (refer to FIG. 1 ) in the first direction DR1.

As shown in FIG. 19 and FIG. 20 , the arrangement form of the secondlight emitting element ED2 positioned in the straight line portion STR(refer to FIG. 1 ) is different from the arrangement form of the secondlight emitting element ED2 positioned in the rounded portion RND (referto FIG. 1 ).

Four second light emitting elements ED2 are connected to one secondpixel circuit portion PC2. Sixteen second light emitting elements ED2adjacent to each other in the first direction DR1 and the seconddirection DR2 may form one second light emitting element group EDGr2. Ineach second light emitting element group EDGr2, the sixteen second lightemitting elements ED2 may be arranged in a matrix format of 2×8. Secondlight emitting element groups EDGr2 may be disposed in a matrix formatalong the first direction DR1 and the second direction DR2. The secondlight emitting element group EDGr2 may include four first sub-lightemitting elements E2R, four second sub-light emitting elements E2B, fourthird sub-light emitting elements E2G1, and four fourth sub-lightemitting elements E2G2.

One first light emitting element ED1 is connected to one first pixelcircuit portion PC1. Four second light emitting elements ED1 adjacent toeach other in the first direction DR1 and the second direction DR2 mayform one first light emitting element group EDGr1. First light emittingelement groups EDGr1 may be disposed in a matrix format along the firstdirection DR1 and the second direction DR2. The first light emittingelement group EDGr1 may include one first sub-light emitting elementE1R, one second sub-light emitting element ElB, one third sub-lightemitting element ElG1, and one fourth sub-light emitting element ElG2.

In the first row, three second light emitting element groups EDGr2 aredisposed along the first direction DR1, and following third second lightemitting element groups EDGr2, the first light emitting element groupEDGr1 is disposed along the first direction DR1. The number of secondlight emitting element groups EDGr2 is not limited thereto, and may bechanged. In the second row, three second light emitting element groupsEDGr2 are disposed along the first direction DR1, and following thethird second light emitting element group (EDGr2), the first lightemitting element group EDGr1 may be disposed along the first directionDR1.

In the straight line portion STR (refer to FIG. 1 ), edges of adjacentsecond light emitting element groups EDGr2 are aligned in the seconddirection DR2. In the rounded portion RND (refer to FIG. 1 ), edges ofsecond light emitting element groups EDGr2 that are adjacent to eachother in the second direction DR2 may be shifted and thus are notaligned. In the second row, as the second light emitting element groupsEDGr2 are shifted to the right, the number of first light emittingelement groups EDGr1 may be reduced. A distance at which edges of secondlight emitting element groups EDGr2 that are adjacent to each other inthe second direction may be shifted in the rounded portion RND (refer toFIG. 1 ) may correspond to four widths of the second light emittingelement ED2. In the second row, the number of first light emittingelement groups EDGr1 is reduced by one compared to the first row.

Referring to FIG. 21 , in other embodiments, the arrangement of thefirst pixel circuit portion PC1 and the second pixel circuit portionPC2, and the arrangement of the first light emitting elements ED1 andthe second light emitting elements ED2 may be partially modified.

FIG. 21 shows an arrangement form of the first pixel circuit portion andthe second pixel circuit portion and an arrangement form of the firstlight emitting elements ED1 and the second light emitting elements ED2.FIG. 21 illustrates second light emitting elements ED2 positioned in therounded portions RND (refer to FIG. 1 ), which are the rounded edges ofthe display area DA. The light emitting elements ED1 and ED2 aredisposed adjacent to the rounded edge of the display area in the firstdirection DR1. The first and second light emitting elements ED1 and ED2disposed in the straight line portion STR (refer to FIG. 1 ) arearranged similarly as the previous examples.

As shown in FIG. 21 , in the rounded portion RND (refer to FIG. 1 ), theedges of the adjacent second light emitting element groups EDGr2 areshifted in the second direction DR2 and thus are not aligned. In thesecond row, as the second light emitting element groups EDGr2 areshifted to the right, the first light emitting element group EDGr1 maybe shifted to the right. The distance second light emitting elementgroups EDGr2 that are adjacent to each other in the second direction DR2are shifted by two widths of the second light emitting element ED2 inthe rounded portion RND (refer to FIG. 1 ). In the second row, thenumber of first light emitting element groups EDGr1 is reduced by onecompared to the first row.

For comparison, a comparative example display device may implement arounded portion RND (refer to FIG. 1 ) by reducing the number of secondlight emitting element groups EDGr2 positioned in the second row by one.In the comparative example, the distance the edges of the second lightemitting element groups EDGr2 that are adjacent to each other in thesecond direction DR2 are shifted may correspond to eight widths of thesecond light emitting element ED2 (rather than two widths as in FIG. 21or four widths as in FIG. 20 ). As the shift distance increases, a stepshape may become visible the rounded portion RND (refer to FIG. 1 ), andthe edge may not be implemented as a smooth curved line. In the displaydevice according to the embodiments, the rounded portion RND (refer toFIG. 1 ) may be prevented from being viewed as a step shape by reducingthe shift distance. The edge may be implemented as a smooth curved line.

Hereinafter, referring to FIG. 22 to FIG. 24 , a display deviceaccording to an embodiment will be described.

A display device according to an embodiment shown in FIG. 22 to FIG. 24is almost the same as the embodiments shown in FIG. 1 to FIG. 21 , andtherefore, repetitive descriptions of the same elements will be omitted.The embodiments of FIG. 22 to FIG. 24 are different from the embodimentsof FIG. 1 to FIG. 21 in that the number of second light emittingelements forming a second light emitting element group positioned in astraight line portion STR (refer to FIG. 1 ) of an edge of a displayarea is different from the number of second light emitting elementsforming a second light emitting element group positioned in a roundportion RND (refer to FIG. 1 ).

FIG. 22 is a schematic top plan view of an area of the display deviceaccording to the embodiment. FIG. 22 illustrates a rounded portion RND(refer to FIG. 1 ) and the periphery of a display area DA of the displaydevice according to the embodiment. FIG. 22 shows a boundary between afirst display area DA1 and a second display area DA2. FIG. 23 and FIG.24 show second light emitting elements positioned at edges of thedisplay area of the display device according to an embodiment. FIG. 23shows second light emitting elements ED2 positioned in a straight lineportion STR (refer to FIG. 1 ) of the edge of the display area DA, andFIG. 24 shows second light emitting elements ED2 positioned in therounded portion RND (refer to FIG. 1 ) of the edge of the display areaDA.

As shown in FIG. 22 , the display area DA of the display deviceaccording to the embodiment includes a first display area DA1 and asecond display area DA2. The second display area DA2 may be positionedat the edge of the display area DA. For example, the second display areaDA2 may be positioned on the left edge and the right edge of the displayarea DA. The second display area DA2 may be positioned in the roundedportion RND (refer to FIG. 1 ) of the edge of the display area DA.

In the second display area DA2, a second pixel circuit portion PC2 isconnected to multiple second light emitting elements ED2. Accordingly,the number of second light emitting elements ED2 forming a second lightemitting element group EDGr2 is greater than the number of first lightemitting elements ED1 forming a first light emitting element groupEDGr1. As described in the previous embodiment, the second lightemitting element group EDGr2 may be formed of eight, twelve, or sixteensecond light emitting elements ED2. The number of second light emittingelements ED2 forming the second light emitting element group EDGr2 isnot limited thereto, and may be changed.

As described above, when a rounded shape is implemented by changing thenumber of second light emitting element groups EDGr2, a stepped shapemay be visible. In the embodiments of FIG. 1 to FIG. 21 , the roundedshape may be smoothly implemented by shifting the second light emittingelement group EDGr2 positioned in the rounded portion RND (refer to FIG.1 ). In an embodiment, the rounded shape may be smoothly implemented byturning off some of the second light emitting elements ED2 forming thesecond light emitting element group EDGr2 positioned on the roundedportion RND (refer to FIG. 1 ). FIG. 22 shows an off area OA in whichsome of the second light emitting elements ED2 positioned in the roundedportion RND (refer to FIG. 1 ) may be in an off state. For example, arounded shape may be implemented by changing the number of second lightemitting elements ED2 forming the second light emitting element groupEDGr2 positioned in the rounded portion RND (refer to FIG. 1 ).Therefore, the number of second light emitting elements ED2 forming thesecond light emitting element group EDGr2 positioned in the roundedportion RND (refer to FIG. 1 ) may be less than the number of secondlight emitting elements ED2 forming the second light emitting elementgroup EDGr2 positioned in the straight line portion STR (refer to FIG. 1).

As shown in FIG. 23 , the second light emitting element group EDGr2positioned in the straight line portion STR (refer to FIG. 1 ) of theedge of the display area DA of the display device according to theembodiment may be formed of sixteen second light emitting elements ED2.In the second light emitting element group EDGr2, the sixteen secondlight emitting elements ED2 may be arranged in a matrix format of 2×8.The second light emitting element group EDGr2 may include four firstsub-light emitting elements E2R, four second sub-light emitting elementsE2B, four third sub-light emitting elements E2G1, and four fourthsub-light emitting elements E2G2. In the second light emitting elementgroup EDGr2, the four first sub-light emitting elements E2R may beelectrically connected to each other and may receive the same signal andexhibit the same luminance. In the second light emitting element groupEDGr2, the four second sub-light emitting elements E2B may beelectrically connected to each other and may receive the same signal andexhibit the same luminance. In the second light emitting element groupEDGr2, the four third sub-light emitting elements E2G1 are electricallyconnected to each other and may receive the same signal and exhibit thesame luminance. In the second light emitting element group EDGr2, thefour fourth sub-light emitting elements E2G2 may be electricallyconnected to each other and may receive the same signal and exhibit thesame luminance.

As shown in FIG. 24 , the second light emitting element group EDGr2positioned in the rounded portion RND (refer to FIG. 1 ) of the edge ofthe display area DA of the display device according to the embodimentmay be formed of fourteen second light emitting elements ED2. The secondlight emitting element group EDGr2 may include four first sub-lightemitting elements E2R, three second sub-light emitting elements E2B,three third sub-light emitting elements E2G1, and four fourth sub-lightemitting elements E2G2. In the second light emitting element groupEDGr2, the four first sub-light emitting elements E2R may beelectrically connected to each other and may receive the same signal andexhibit the same luminance. In the second light emitting element groupEDGr2, the three second sub-light emitting elements E2B may beelectrically connected to each other and may receive the same signal andexhibit the same luminance. In the second light emitting element groupEDGr2, the three third sub-light emitting elements E2G1 may beelectrically connected to each other and may receive the same signal andexhibit the same luminance. In the second light emitting element groupEDGr2, the four fourth sub-light emitting elements E2G2 may beelectrically connected to each other and may receive the same signal andexhibit the same luminance.

The second light emitting element group EDGr2 disposed in the roundedportion RND (refer to FIG. 1 ) may have an arrangement form in which atleast one second light emitting element ED2 disposed at the edge is offcompared to a second light emitting element group EDGr2 disposed in thestraight line portion STR (refer to FIG. 1 ). For example, in the secondlight emitting element group EDGr2 disposed in the rounded portion RND(refer to FIG. 1 ), a second sub-light emitting element E2B and a thirdsub-light emitting element E2G1 may be individually turned off. Theturned off second sub-light emitting elements E2B and E2G1 may bedisposed in the lower left end with respect to a second light emittingelement group EDGr2 disposed in the straight line portion STR (refer toFIG. 1 ), where all the second light emitting elements EB2 are turnedon. For example, in the second light emitting element group EDGr2positioned in the rounded portion RND (refer to FIG. 1 ), second lightemitting elements ED2 positioned at the first and second columns in thefirst row among the sixteen second light emitting elements ED2 may beturned off. However, this is only an example, and the number andpositions of the second light emitting element ED2 that are turned offin the second light emitting element group EDGr2 positioned in therounded portion RND (refer to FIG. 1 ) may be changed.

It is possible to turn off some second light emitting elements ED2disposed in the rounded portion RND (refer to FIG. 1 ) through variousmethods. Hereinafter, referring to the embodiments of FIG. 25 to FIG. 27, the off area OA in which some second light emitting elements ED2positioned in the rounded portion RND (refer to FIG. 1 ) are turned offwill be described.

FIG. 25 to FIG. 27 are schematic cross-sectional views of a part of thedisplay device according to the embodiment.

As shown in FIG. 25 , second light emitting elements ED2 connected to asecond pixel circuit portion PC2 may be removed from the rounded portionRND (refer to FIG. 1 ). For example, the pixel electrode 2191 and theemission layer 2370 may not be positioned in the off area OA. UnlikeFIG. 3 , FIG. 25 illustrates only one second light emitting element ED2.Although an extension wire 600 is illustrated in the off area OA, it isnot limited thereto, and the extension wire 600 may also be removed fromthe off area OA.

As shown in FIG. 26 , in the off area OA, a pixel electrode 2191 may bepositioned but an emission layer 2370 may not be positioned in the offarea OA. The pixel opening 2351 may not be formed in a partitioning wall350 overlapping the pixel electrode 2191 positioned in the off area OA.

in other examples, both the pixel electrode 2191 and the emission layer2370 may be disposed in the off area OA, and the pixel electrode 2191positioned in the off area OA may block a signal from being transmittedfrom the extension wire 600. For example, an opening 2181 for connectingthe pixel electrode 2191 and the extension wire 600 positioned in theoff area OA may not be formed, or a part of the extension wire 600 maybe disconnected.

As described, the amount of current transmitted from one second pixelcircuit portion PC2 to the second light emitting elements ED2 may beincreased by turning off some of the second light emitting elements ED2positioned on the rounded portion RND (refer to FIG. 1 ). For example,the second light emitting element ED2 positioned in the rounded portionRND (refer to FIG. 1 ) may have higher luminance than the second lightemitting element ED2 positioned in the straight line portion STR (referto FIG. 1 ), and such a difference in luminance may be visible. As shownin FIG. 27 , the luminance may be lowered by reducing a width Wpo of apixel opening 2351 of the second light emitting element ED2 positionedin the rounded portion RND (refer to FIG. 1 ). The pixel opening 2351 ofthe second light emitting element ED2 in FIG. 27 is smaller than that ofthe second light emitting element ED2 in FIG. 26 .

The number of second light emitting elements ED2 formed in the secondlight emitting element group EDGr2 positioned in the rounded portion RND(refer to FIG. 1 ) may be less than the number of second light emittingelements ED2 formed in the second light emitting element group EDGr2positioned in the straight line portion STR (refer to FIG. 1 ). Thewidth of an light emission area of the second light emitting elementsED2 forming the second light emitting element group EDGr2 having arelatively small number of second light emitting elements ED2 may besmaller than a width of a light emission area of the light emittingelements ED2 forming the second light emitting element group EDGr2positioned in the straight line portion STR (refer to FIG. 1 ).

Hereinafter, a comparative example display device shown in FIG. 28 andthe display device according to the embodiment will be compared anddescribed.

FIG. 28 is a schematic top plan view of a part of a display deviceaccording to a comparative example. FIG. 28 shows a round portion of anedge of a display area of a display device according to a comparativeexample and its periphery. In the comparative example, the number ofsecond light emitting elements ED2 forming a second light emittingelement group EDGr2 positioned in a straight line portion STR (refer toFIG. 1 ) and in a rounded portion RND (refer to FIG. 1 ) may be thesame. As shown in FIG. 28 , the round portion of the edge of the displayarea is not implemented as a smooth curved line, and a step is visible.In contrast, the display device according to the embodiments, as shownin FIG. 22 , may represent a smooth curved line shape by turning offsome second light emitting elements ED2 positioned on the roundedportion RND (refer to FIG. 1 ).

Hereinafter, referring to FIG. 29 , a display device according to anembodiment will be described.

A display device according to an embodiment shown in FIG. 29 is almostthe same as the display device according to the embodiment shown in FIG.22 to FIG. 27 , and repetitive descriptions of the same parts will beomitted. The embodiment is different from that of FIG. 22 in that afirst display area instead of a second display area may be disposed insome regions of a rounded portion of an edge of a display area. Thiswill be further described below.

FIG. 29 is a top plan view of an area of a display area according to anembodiment.

As shown in FIG. 29 , a display area DA of a display device according toan embodiment includes a first display area DA1 and a second displayarea DA2. The first display area DA1 or the second display area DA2 maybe positioned at an edge of the display area DA.

In an embodiment, the second display area DA2 may be disposed and thefirst display area DA1 may not be disposed in the rounded portion RND(refer to FIG. 1 ) of the edge of the display area DA. In theembodiment, the second display area DA2 may be positioned on a part ofthe rounded portion RND (refer to FIG. 1 ) of the edge of the displayarea DA, and the first display area DA1 may be positioned on theremaining part. The first display area DA1 is positioned at an end REAof the rounded portion RND (refer to FIG. 1 ) rather than the seconddisplay area DA2.

The second light emitting element ED2 in the second light emittingelement group EDGr2 may be arranged in a matrix format such as 2×4, 2×6,2×8, and the like. Accordingly, the second light emitting element groupEDGr2 may have a shape extending long in the row direction. Accordingly,as shown in FIG. 28 , it can be observed that a step shape is morerecognized as it goes to the lower end of the rounded portion RND (referto FIG. 1 ).

The first display area DA1 may be disposed instead of the second displayarea DA2 in the lower end REA of the rounded portion RND (refer to FIG.1 ) in the embodiment. The number of first light emitting elements ED1in the first light emitting element group EDGr1 positioned in the firstdisplay area DA1 is less than the number of the second light emittingelements ED2 in the second light emitting element group EDGr2 positionedin the second display area DA2, and therefore the rounded portion RND(refer to FIG. 1 ) can be implemented as a smoother curved line. FIG. 29shows a rounded portion RND (refer to FIG. 1 ) positioned at the lowerleft of the display area DA. Although not shown, even in the case of therounded portion RND (refer to FIG. 1 ) positioned at the lower right ofthe display area DA, the first display area DA1 may be positioned at thelower end of the rounded portion RND (refer to FIG. 1 ) instead of thesecond display area DA2. In the rounded portion RND (refer to FIG. 1 )positioned at the upper left and upper right of the display area DA, thefirst display area DA1 is positioned at an upper end of the roundedportion RND (refer to FIG. 1 ) instead of the second display area DA2.

Embodiments have been disclosed herein, and although terms are employed,they are used and are to be interpreted in a generic and descriptivesense only and not for purpose of limitation. In some instances, aswould be apparent by one of ordinary skill in the art, features,characteristics, and/or elements described in connection with anembodiment may be used singly or in combination with features,characteristics, and/or elements described in connection with otherembodiments unless otherwise specifically indicated. Accordingly, itwill be understood by those of ordinary skill in the art that variouschanges in form and details may be made without departing from thespirit and scope of the disclosure as set forth in the following claims.

What is claimed is:
 1. A display device comprising: a display area, thedisplay area including: a first display area; and a second display area;a first pixel circuit portion that is disposed on the first displayarea; a first light emitting element that is electrically connected tothe first pixel circuit portion; a second pixel circuit portion that isdisposed on the second display area; second light emitting elements thatare electrically connected to the second pixel circuit portion; and adriving circuit portion that is electrically connected to the firstpixel circuit portion and to the second pixel circuit portion, andoverlapping the second light emitting element, in a plan view, wherein,an edge of the display area includes: a straight line portion having astraight line shape; and a rounded portion having a rounded shape, andan arrangement form of the second light emitting elements disposed inthe straight line portion and an arrangement form of the second lightemitting elements disposed in the rounded portion are different.
 2. Thedisplay device of claim 1, further comprising: light emitting elementgroups, each of the light emitting element groups including eight of thesecond light emitting elements that are adjacent to each other in afirst direction, and in a second direction that is perpendicular to thefirst direction, wherein the second pixel circuit portion iselectrically connected to two of the second light emitting elements,edges of the light emitting element groups that are adjacent to eachother in the second direction and are disposed in the straight lineportion are aligned with each other, and edges of light emitting elementgroups that are adjacent to each other in the second direction and aredisposed in the rounded portion are shifted and not aligned with eachother.
 3. The display device of claim 2, wherein the eight of the secondlight emitting elements of each of the light emitting element groups arearranged in a matrix format of 2×4, and a distance the edges of lightemitting element groups that are adjacent to each other in the seconddirection and disposed in the rounded portion are shifted from eachother corresponds to one or two widths of one of the second lightemitting elements.
 4. The display device of claim 1, further comprising:light emitting element groups, each of the light emitting element groupsincluding twelve of the second light emitting elements that are adjacentto each other in a first direction, and in a second direction that isperpendicular to the first direction, wherein the second pixel circuitportion is electrically connected to three second light emittingelements, edges of the light emitting element groups that are adjacentto each other in the second direction and are disposed in the straightline portion are aligned with each other, and edges of light emittingelement groups that are adjacent to each other in the second directionand are disposed in the rounded portion are shifted and not aligned witheach other.
 5. The display device of claim 4, wherein the twelve of thesecond light emitting elements of each of the light emitting elementgroups are arranged in a matrix format of 2×6, and a distance the edgesof light emitting element groups that are adjacent to each other in thesecond direction and disposed in the rounded portion are shifted fromeach other corresponds to two or four widths of one of the second lightemitting elements.
 6. The display device of claim 1, further comprising:light emitting element groups, each of the light emitting element groupsincluding sixteen of the second light emitting elements that areadjacent to each other in a first direction, and in a second directionthat is perpendicular to the first direction, wherein four second lightemitting elements are electrically connected to the second pixel circuitportion, edges of the light emitting element groups that are adjacent toeach other in the second direction and are disposed in the straight lineportion are aligned with each other, and edges of the light emittingelement groups that are adjacent to each other in the second directionand are disposed in the rounded portion are shifted and not aligned witheach other.
 7. The display device of claim 6, wherein the sixteen lightemitting elements of each of the light emitting element groups arearranged in a matrix format of 2×8, and a distance the edges of lightemitting element groups that are adjacent to each other in the seconddirection and disposed in the rounded portion are shifted from eachother corresponds to two or four widths of one of the second lightemitting elements.
 8. The display device of claim 1, wherein the secondpixel circuit portion includes: a first sub-pixel circuit portion; asecond sub-pixel circuit portion; a third sub-pixel circuit portion; anda fourth sub-pixel circuit portion, and each of the second lightemitting elements includes: first sub-light emitting elements that areelectrically connected to the first sub-pixel circuit portion; secondsub-light emitting elements that are electrically connected to thesecond sub-pixel circuit portion; third sub-light emitting elements thatare electrically connected to the third sub-pixel circuit portion; andfourth sub-light emitting elements that are electrically connected tothe fourth sub-pixel circuit portion.
 9. The display device of claim 8,wherein the first sub-light emitting elements emit red light, the secondsub-light emitting elements emit blue light, and the third sub-lightemitting elements and the fourth sub-light emitting elements emit greenlight.
 10. The display device of claim 1, further comprising: anextension wire that electrically connects the second pixel circuitportion to the second light emitting elements.
 11. The display device ofclaim 1, further comprising: a peripheral area surrounding the displayarea, wherein the display area displays an image, the second displayarea is disposed between the first display area and the peripheral area,a part of the driving circuit portion overlaps the second display areain a plan view, and a remaining part of the driving circuit portionoverlaps the peripheral area in a plan view.
 12. The display device ofclaim 1, further comprising: light emitting element groups, each of thelight emitting element groups including at least one of the second lightemitting elements that are adjacent to each other in a first direction,and in a second direction that is perpendicular to the first direction,wherein a number of second light emitting elements included in one ofthe light emitting element groups disposed in the rounded portion and anumber of second light emitting elements included in one of the lightemitting element groups disposed in the straight line portion aredifferent.
 13. The display device of claim 12, wherein the number ofsecond light emitting elements included in one of the light emittingelement groups disposed in the rounded portion is less than the numberof second light emitting elements included in one of the light emittingelement groups disposed in the straight line portion.
 14. The displaydevice of claim 12, wherein at least one of the light emitting elementgroups disposed in the rounded portion includes at least one of thesecond light emitting elements that is disposed on the edge withreference to a light emitting element group disposed on the straightline portion and is turned off.
 15. The display device of claim 14,wherein sixteen of the second light emitting elements included in one ofthe light emitting element groups that are disposed in the straight lineportion are arranged in a matrix format of 2×8, and the light emittingelement groups that are disposed in the rounded portion have anarrangement form in which second light emitting elements disposed in thesecond row and the first column, and the second row and the secondcolumn are turned off.
 16. The display device of claim 14, wherein atleast one of the second light emitting elements comprises: a pixelelectrode electrically connected to the second pixel circuit portion; anemission layer disposed on the pixel electrode; and a common electrodedisposed on the emission layer.
 17. The display device of claim 16,wherein in an area where at least one of the second light emittingelements is turned off, the pixel electrode and the emission layer arenot disposed.
 18. The display device of claim 16, wherein in an areawhere at least one of the second light emitting elements is turned off,the pixel electrode is disposed, and the emission layer is not disposed.19. The display device of claim 14, wherein a width of a light emittingarea of the second light emitting element of the light emitting elementgroup among the light emitting element groups disposed in the roundedportion is narrower than a width of a light emitting area of the secondlight emitting element of the light emitting element group among thelight emitting element groups disposed in on the straight line portion.20. The display device of claim 12, wherein a portion of the firstdisplay area is disposed in an end of the rounded portion, and thesecond display area is not disposed in the end of the rounded portion.